Updated on 2022/05/06

写真a

 
ICHIKI, Kiyotomo
 
Organization
Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI) Associate professor
Graduate School
Graduate School of Science
Title
Associate professor

Degree 1

  1. 博士(理学) ( 2005.3   東京大学 ) 

Research History 5

  1. 理学研究科   准教授

    2017.8

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    Country:Japan

  2. 基礎理論研究センター   講師

    2015.12 - 2017.7

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    Country:Japan

  3. 理学研究科   助教

    2008.10 - 2015.11

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    Country:Japan

  4. 日本学術振興会特別研究員

    2006.4 - 2008.9

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    Country:Japan

  5. 日本学術振興会特別研究員

    2004.4 - 2006.3

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    Country:Japan

Education 2

  1. The University of Tokyo   Graduate School, Division of Science   Astronomy

    2000.4 - 2005.3

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    Country: Japan

  2. Kyoto University   Faculty of Science

    1996.4 - 2000.3

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    Country: Japan

 

Papers 120

  1. Measuring the cosmological density field twice: A novel test of dark energy using the CMB quadrupole Reviewed International coauthorship

    Kiyotomo Ichiki, Kento Sumiya, and Guo-Chin Liu

    Physical Review D   Vol. 105   2022.3

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1103/PhysRevD.105.063507

  2. 21 cm forest constraints on primordial black holes Reviewed

    Pablo Villanueva-Domingo, Kiyotomo Ichiki

    Publications of the Astronomical Society of Japan     2022.2

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1093/pasj/psab119

  3. Densified Pupil Spectrograph as High-precision Radial Velocimetry: From Direct Measurement of the Universe's Expansion History to Characterization of Nearby Habitable Planet Candidates Reviewed International coauthorship

    Matsuo, Taro search by orcid ; Greene, Thomas P. search by orcid ; Qezlou, Mahdi search by orcid ; Bird, Simeon search by orcid ; Ichiki, Kiyotomo ; Fujii, Yuka search by orcid ; Yamamuro, Tomoyasu

    The Astronomical Journal   Vol. 163 ( 2 )   2022.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3847/1538-3881/ac397b

  4. An iterative reconstruction algorithm for Faraday tomography Reviewed

    Cooray Suchetha, Takeuchi Tsutomu T., Akahori Takuya, Miyashita Yoshimitsu, Ideguchi Shinsuke, Takahashi Keitaro, Ichiki Kiyotomo

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 500 ( 4 ) page: 5129 - 5141   2021.2

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/mnras/staa3580

    Web of Science

  5. 21 cm forest probes on axion dark matter in postinflationary Peccei- Quinn symmetry breaking scenarios Reviewed International coauthorship

    Shimabukuro Hayato, Ichiki Kiyotomo, Kadota Kenji

    PHYSICAL REVIEW D   Vol. 102 ( 2 )   2020.7

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.102.023522

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  6. Updated Design of the CMB Polarization Experiment Satellite LiteBIRD Reviewed International coauthorship

    Sugai H., Ade P. A. R., Akiba Y., Alonso D., Arnold K., Aumont J., Austermann J., Baccigalupi C., Banday A. J., Banerji R., Barreiro R. B., Basak S., Beall J., Beckman S., Bersanelli M., Borrill J., Boulanger F., Brown M. L., Bucher M., Buzzelli A., Calabrese E., Casas F. J., Challinor A., Chan V., Chinone Y., Cliche J. -F., Columbro F., Cukierman A., Curtis D., Danto P., de Bernardis P., de Haan T., De Petris M., Dickinson C., Dobbs M., Dotani T., Duband L., Ducout A., Duff S., Duivenvoorden A., Duval J. -M., Ebisawa K., Elleflot T., Enokida H., Eriksen H. K., Errard J., Essinger-Hileman T., Finelli F., Flauger R., Franceschet C., Fuskeland U., Ganga K., Gao J. -R., Genova-Santos R., Ghigna T., Gomez A., Gradziel M. L., Grain J., Grupp F., Gruppuso A., Gudmundsson J. E., Halverson N. W., Hargrave P., Hasebe T., Hasegawa M., Hattori M., Hazumi M., Henrot-Versille S., Herranz D., Hill C., Hilton G., Hirota Y., Hivon E., Hlozek R., Hoang D. -T., Hubmayr J., Ichiki K., Iida T., Imada H., Ishimura K., Ishino H., Jaehnig G. C., Jones M., Kaga T., Kashima S., Kataoka Y., Katayama N., Kawasaki T., Keskitalo R., Kibayashi A., Kikuchi T., Kimura K., Kisner T., Kobayashi Y., Kogiso N., Kogut A., Kohri K., Komatsu E., Komatsu K., Konishi K., Krachmalnicoff N., Kuo C. L., Kurinsky N., Kushino A., Kuwata-Gonokami M., Lamagna L., Lattanzi M., Lee A. T., Linder E., Maffei B., Maino D., Maki M., Mangilli A., Martinez-Gonzalez E., Masi S., Mathon R., Matsumura T., Mennella A., Migliaccio M., Minami Y., Mistuda K., Molinari D., Montier L., Morgante G., Mot B., Murata Y., Murphy J. A., Nagai M., Nagata R., Nakamura S., Namikawa T., Natoli P., Nerval S., Nishibori T., Nishino H., Nomura Y., Noviello F., O'Sullivan C., Ochi H., Ogawa H., Ogawa H., Ohsaki H., Ohta I., Okada N., Okada N., Pagano L., Paiella A., Paoletti D., Patanchon G., Piacentini F., Pisano G., Polenta G., Poletti D., Prouve T., Puglisi G., Rambaud D., Raum C., Realini S., Remazeilles M., Roudil G., Rubino-Martin J. A., Russell M., Sakurai H., Sakurai Y., Sandri M., Savini G., Scott D., Sekimoto Y., Sherwin B. D., Shinozaki K., Shiraishi M., Shirron P., Signorelli G., Smecher G., Spizzi P., Stever S. L., Stompor R., Sugiyama S., Suzuki A., Suzuki J., Switzer E., Takaku R., Takakura H., Takakura S., Takeda Y., Taylor A., Taylor E., Terao Y., Thompson K. L., Thorne B., Tomasi M., Tomida H., Trappe N., Tristram M., Tsuji M., Tsujimoto M., Tucker C., Ullom J., Uozumi S., Utsunomiya S., Van Lanen J., Vermeulen G., Vielva P., Villa F., Vissers M., Vittorio N., Voisin F., Walker I., Watanabe N., Wehus I., Weller J., Westbrook B., Winter B., Wollack E., Yamamoto R., Yamasaki N. Y., Yanagisawa M., Yoshida T., Yumoto J., Zannoni M., Zonca A.

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 199 ( 3-4 ) page: 1107 - 1117   2020.5

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s10909-019-02329-w

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  7. Constraining the nature of ultra light dark matter particles with the 21 cm forest

    Shimabukuro Hayato, Ichiki Kiyotomo, Kadota Kenji

    PHYSICAL REVIEW D   Vol. 101 ( 4 )   2020.2

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.101.043516

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  8. Cross-correlation between 21-cm radiation and CMB B modes from the cosmic birefringence in the presence of a light scalar field

    Kadota Kenji, Ooba Junpei, Tashiro Hiroyuki, Ichiki Kiyotomo, Liu Guo-Chin

    PHYSICAL REVIEW D   Vol. 100 ( 6 )   2019.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.100.063506

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  9. Space gravitational-wave antennas DECIGO and B-DECIGO

    Kawamura Seiji, Nakamura Takashi, Ando Masaki, Seto Naoki, Akutsu Tomotada, Funaki Ikkoh, Ioka Kunihito, Kanda Nobuyuki, Kawano Isao, Musha Mitsuru, Nakazawa Kazuhiro, Sato Shuichi, Takashima Takeshi, Tanaka Takahiro, Tsubono Kimio, Yokoyama Jun'ichi, Agatsuma Kazuhiro, Aoyanagi Koh-suke, Arai Koji, Araya Akito, Aritomi Naoki, Asada Hideki, Aso Yoichi, Chen Dan, Chiba Takeshi, Ebisuzaki Toshikazu, Eguchi Satoshi, Ejiri Yumiko, Enoki Motohiro, Eriguchi Yoshiharu, Fujimoto Masa-Katsu, Fujita Ryuichi, Fukushima Mitsuhiro, Futamase Toshifumi, Gondo Rina, Harada Tomohiro, Hashimoto Tatsuaki, Hayama Kazuhiro, Hikida Wataru, Himemoto Yoshiaki, Hirabayashi Hisashi, Hiramatsu Takashi, Hong Feng-Lei, Horisawa Hideyuki, Hosokawa Mizuhiko, Ichiki Kiyotomo, Ikegami Takeshi, Inoue Kaiki T., Ishihara Hideki, Ishikawa Takehiko, Ishizaki Hideharu, Ito Hiroyuki, Itoh Yousuke, Izumi Kiwamu, Kanemura Shinya, Kawashima Nobuki, Kawazoe Fumiko, Kishimoto Naoko, Kiuchi Kenta, Kobayashi Shiho, Kohri Kazunori, Koizumi Hiroyuki, Kojima Yasufumi, Kokeyama Keiko, Kokuyama Wataru, Kotake Kei, Kozai Yoshihide, Kunimori Hiroo, Kuninaka Hitoshi, Kuroda Kazuaki, Kuroyanagi Sachiko, Maeda Kei-ichi, Matsuhara Hideo, Matsumoto Nobuyuki, Michimura Yuta, Miyakawa Osamu, Miyamoto Umpei, Miyoki Shinji, Morimoto Mutsuko Y., Morisawa Toshiyuki, Moriwaki Shigenori, Mukohyama Shinji, Nagano Shigeo, Nakamura Kouji, Nakano Hiroyuki, Nakao Kenichi, Nakasuka Shinichi, Nakayama Yoshinori, Nishida Erina, Nishizawa Atsushi, Niwa Yoshito, Noumi Taiga, Obuchi Yoshiyuki, Ohishi Naoko, Ohkawa Masashi, Okada Kenshi, Okada Norio, Okutomi Koki, Oohara Kenichi, Sago Norichika, Saijo Motoyuki, Saito Ryo, Sakagami Masaaki, Sakai Shin-ichiro, Sakata Shihori, Sasaki Misao, Sato Takashi, Shibata Masaru, Shibata Kazunori, Shimo-oku Ayumi, Shinkai Hisaaki, Shoda Ayaka, Somiya Kentaro, Sotani Hajime, Suemasa Aru, Sugiyama Naoshi, Suwa Yudai, Suzuki Rieko, Tagoshi Hideyuki, Takahashi Fuminobu, Takahashi Kakeru, Takahashi Keitaro, Takahashi Ryutaro, Takahashi Ryuichi, Takahashi Hirotaka, Akiteru Takamori, Takano Tadashi, Tanaka Nobuyuki, Taniguchi Keisuke, Taruya Atsushi, Tashiro Hiroyuki, Torii Yasuo, Toyoshima Morio, Tsujikawa Shinji, Ueda Akitoshi, Ueda Ken-ichi, Ushiba Takafumi, Utashima Masayoshi, Wakabayashi Yaka, Yagi Kent, Yamamoto Kazuhiro, Yamazaki Toshitaka, Yoo Chul-Moon, Yoshida Shijun, Yoshino Taizoh

    INTERNATIONAL JOURNAL OF MODERN PHYSICS D   Vol. 28 ( 12 )   2019.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1142/S0218271818450013

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  10. Simultaneous determination of the cosmic birefringence and miscalibrated polarization angles from CMB experiments

    Minami Yuto, Ochi Hiroki, Ichiki Kiyotomo, Katayama Nobuhiko, Komatsu Eiichiro, Matsumura Tomotake

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   Vol. 2019 ( 8 )   2019.8

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/ptep/ptz079

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  11. Magnetic field and ISM in the local Galactic disc

    Sofue Y., Nakanishi H., Ichiki K.

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 485 ( 1 ) page: 924 - 933   2019.5

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/mnras/stz407

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  12. Delta-map method of removing CMB foregrounds with spatially varying spectra

    Ichiki Kiyotomo, Kanai Hiroaki, Katayama Nobuhiko, Komatsu Eiichiro

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   Vol. 2019 ( 3 )   2019.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/ptep/ptz009

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  13. LiteBIRD: A Satellite for the Studies of B-Mode Polarization and Inflation from Cosmic Background Radiation Detection

    Hazumi M., Ade P. A. R., Akiba Y., Alonso D., Arnold K., Aumont J., Baccigalupi C., Barron D., Basak S., Beckman S., Borrill J., Boulanger F., Bucher M., Calabrese E., Chinone Y., Cho S., Cukierman A., Curtis D. W., de Haan T., Dobbs M., Dominjon A., Dotani T., Duband L., Ducout A., Dunkley J., Duval J. M., Elleflot T., Eriksen H. K., Errard J., Fischer J., Fujino T., Funaki T., Fuskeland U., Ganga K., Goeckner-Wald N., Grain J., Halverson N. W., Hamada T., Hasebe T., Hasegawa M., Hattori K., Hattori M., Hayes L., Hidehira N., Hill C. A., Hilton G., Hubmayr J., Ichiki K., Iida T., Imada H., Inoue M., Inoue Y., Irwin K. D., Ishino H., Jeong O., Kanai H., Kaneko D., Kashima S., Katayama N., Kawasaki T., Kernasovskiy S. A., Keskitalo R., Kibayashi A., Kida Y., Kimura K., Kisner T., Kohri K., Komatsu E., Komatsu K., Kuo C. L., Kurinsky N. A., Kusaka A., Lazarian A., Lee A. T., Li D., Linder E., Maffei B., Mangilli A., Maki M., Matsumura T., Matsuura S., Meilhan D., Mima S., Minami Y., Mitsuda K., Montier L., Nagai M., Nagasaki T., Nagata R., Nakajima M., Nakamura S., Namikawa T., Naruse M., Nishino H., Nitta T., Noguchi T., Ogawa H., Oguri S., Okada N., Okamoto A., Okamura T., Otani C., Patanchon G., Pisano G., Rebeiz G., Remazeilles M., Richards P. L., Sakai S., Sakurai Y., Sato Y., Sato N., Sawada M., Segawa Y., Sekimoto Y., Seljak U., Sherwin B. D., Shimizu T., Shinozaki K., Stompor R., Sugai H., Sugita H., Suzuki A., Suzuki J., Tajima O., Takada S., Takaku R., Takakura S., Takatori S., Tanabe D., Taylor E., Thompson K. L., Thorne B., Tomaru T., Tomida T., Tomita N., Tristram M., Tucker C., Turin P., Tsujimoto M., Uozumi S., Utsunomiya S., Uzawa Y., Vansyngel F., Wehus I. K., Westbrook B., Willer M., Whitehorn N., Yamada Y., Yamamoto R., Yamasaki N., Yamashita T., Yoshida M.

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 194 ( 5-6 ) page: 443-452   2019.3

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    DOI: 10.1007/s10909-019-02150-5

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  14. Study of systematics effects on the cross power spectrum of 21 cm line and cosmic microwave background using Murchison Widefield Array data

    Yoshiura S., Ichiki K., Pindor B., Takahashi K., Tashiro H., Trott C. M.

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 483 ( 2 ) page: 2697-2711   2019.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/mnras/sty3248

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  15. Concept Study of Optical Configurations for High-Frequency Telescope for LiteBIRD

    Hasebe T., Kashima S., Ade P. A. R., Akiba Y., Alonso D., Arnold K., Aumont J., Baccigalupi C., Barron D., Basak S., Beckman S., Borrill J., Boulanger F., Bucher M., Calabrese E., Chinone Y., Cho H. -M., Cukierman A., Curtis D. W., de Haan T., Dobbs M., Dominjon A., Dotani T., Duband L., Ducout A., Dunkley J., Duval J. M., Elleflot T., Eriksen H. K., Errard J., Fischer J., Fujino T., Funaki T., Fuskeland U., Ganga K., Goeckner-Wald N., Grain J., Halverson N. W., Hamada T., Hasegawa M., Hattori K., Hattori M., Hayes L., Hazumi M., Hidehira N., Hill C. A., Hilton G., Hubmayr J., Ichiki K., Iida T., Imada H., Inoue M., Inoue Y., Irwin K. D., Ishino H., Jeong O., Kanai H., Kaneko D., Katayama N., Kawasaki T., Kernasovskiy S. A., Keskitalo R., Kibayashi A., Kida Y., Kimura K., Kisner T., Kohri K., Komatsu E., Komatsu K., Kuo C. L., Kurinsky N. A., Kusaka A., Lazarian A., Lee A. T., Li D., Linder E., Maffei B., Mangilli A., Maki M., Matsumura T., Matsuura S., Meilhan D., Mima S., Minami Y., Mitsuda K., Montier L., Nagai M., Nagasaki T., Nagata R., Nakajima M., Nakamura S., Namikawa T., Naruse M., Nishino H., Nitta T., Noguchi T., Ogawa H., Oguri S., Okada N., Okamoto A., Okamura T., Otani C., Patanchon G., Pisano G., Rebeiz G., Remazeilles M., Richards P. L., Sakai S., Sakurai Y., Sato Y., Sato N., Sawada M., Segawa Y., Sekimoto Y., Seljak U., Sherwin B. D., Shimizu T., Shinozaki K., Stompor R., Sugai H., Sugita H., Suzuki A., Suzuki J., Tajima O., Takada S., Takaku R., Takakura S., Takatori S., Tanabe D., Taylor E., Thompson K. L., Thorne B., Tomaru T., Tomida T., Tomita N., Tristram M., Tucker C., Turin P., Tsujimoto M., Uozumi S., Utsunomiya S., Uzawa Y., Vansyngel F., Wehus I. K., Westbrook B., Willer M., Whitehorn N., Yamada Y., Yamamoto R., Yamasaki N., Yamashita T., Yoshida M.

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 193 ( 5-6 ) page: 841-850   2018.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s10909-018-1915-2

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  16. Thermal Sunyaev-Zel'dovich Effect in the IGM due to Primordial Magnetic Fields

    Minoda Teppei, Hasegawa Kenji, Tashiro Hiroyuki, Ichiki Kiyotomo, Sugiyama Naoshi

    GALAXIES   Vol. 6 ( 4 )   2018.12

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    DOI: 10.3390/galaxies6040143

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  17. The LiteBIRD Satellite Mission: Sub-Kelvin Instrument

    Suzuki A., Ade P. A. R., Akiba Y., Alonso D., Arnold K., Aumont J., Baccigalupi C., Barron D., Basak S., Beckman S., Borrill J., Boulanger F., Bucher M., Calabrese E., Chinone Y., Cho S., Crill B., Cukierman A., Curtis D. W., de Haan T., Dobbs M., Dominjon A., Dotani T., Duband L., Ducout A., Dunkley J., Duval J. M., Elleflot T., Eriksen H. K., Errard J., Fischer J., Fujino T., Funaki T., Fuskeland U., Ganga K., Goeckner-Wald N., Grain J., Halverson N. W., Hamada T., Hasebe T., Hasegawa M., Hattori K., Hattori M., Hayes L., Hazumi M., Hidehira N., Hill C. A., Hilton G., Hubmayr J., Ichiki K., Iida T., Imada H., Inoue M., Inoue Y., Irwin K. D., Ishino H., Jeong O., Kanai H., Kaneko D., Kashima S., Katayama N., Kawasaki T., Kernasovskiy S. A., Keskitalo R., Kibayashi A., Kida Y., Kimura K., Kisner T., Kohri K., Komatsu E., Komatsu K., Kuo C. L., Kurinsky N. A., Kusaka A., Lazarian A., Lee A. T., Li D., Linder E., Maffei B., Mangilli A., Maki M., Matsumura T., Matsuura S., Meilhan D., Mima S., Minami Y., Mitsuda K., Montier L., Nagai M., Nagasaki T., Nagata R., Nakajima M., Nakamura S., Namikawa T., Naruse M., Nishino H., Nitta T., Noguchi T., Ogawa H., Oguri S., Okada N., Okamoto A., Okamura T., Otani C., Patanchon G., Pisano G., Rebeiz G., Remazeilles M., Richards P. L., Sakai S., Sakurai Y., Sato Y., Sato N., Sawada M., Segawa Y., Sekimoto Y., Seljak U., Sherwin B. D., Shimizu T., Shinozaki K., Stompor R., Sugai H., Sugita H., Suzuki J., Tajima O., Takada S., Takaku R., Takakura S., Takatori S., Tanabe D., Taylor E., Thompson K. L., Thorne B., Tomaru T., Tomida T., Tomita N., Tristram M., Tucker C., Turin P., Tsujimoto M., Uozumi S., Utsunomiya S., Uzawa Y., Vansyngel F., Wehus I. K., Westbrook B., Willer M., Whitehorn N., Yamada Y., Yamamoto R., Yamasaki N., Yamashita T., Yoshida M.

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 193 ( 5-6 ) page: 1048-1056   2018.12

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    DOI: 10.1007/s10909-018-1947-7

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  18. Explaining low l anomalies in the CMB power spectrum with resonant superstring excitations during inflation

    Gangopadhyay Mayukh R., Mathews Grant J., Ichiki Kiyotomo, Kajino Toshitaka

    EUROPEAN PHYSICAL JOURNAL C   Vol. 78 ( 9 )   2018.9

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    DOI: 10.1140/epjc/s10052-018-6218-x

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  19. Effect of dark energy perturbation on cosmic voids formation

    Endo Takao, Nishizawa Atsushi J., Ichiki Kiyotomo

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 478 ( 4 ) page: 5230-5239   2018.8

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    DOI: 10.1093/mnras/sty1292

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  20. Observational constraint on spherical inhomogeneity with CMB and local Hubble parameter

    Tokutake Masato, Ichiki Kiyotomo, Yoo Chul-Moon

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 3 )   2018.3

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    DOI: 10.1088/1475-7516/2018/03/033

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  21. Updated observational constraints on quintessence dark energy models

    Durrive Jean-Baptiste, Ooba Junpei, Ichiki Kiyotomo, Sugiyama Naoshi

    PHYSICAL REVIEW D   Vol. 97 ( 4 )   2018.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.97.043503

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  22. Big Bang Nucleosynthesis, the CMB, and the Origin of Matter and Space-Time

    Mathews Grant J., Gangopadhyay Mayukh, Sasankan Nishanth, Ichiki Kiyotomo, Kajino Toshitaka

    14TH INTERNATIONAL SYMPOSIUM ON ORIGIN OF MATTER AND EVOLUTION OF GALAXIES (OMEG 2017)   Vol. 1947   2018

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.5030818

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  23. Concept design of the LiteBIRD satellite for CMB B-mode polarization

    Sekimoto Y., Ade P., Arnold K., Aumont J., Austermann J., Baccigalupi C., Banday A., Banerji R., Basak S., Beckman S., Bersanelli M., Borrill J., Boulanger F., Brown M. L., Bucher M., Calabrese E., Casas F. J., Challinor A., Chinone Y., Columbro F., Cukierman A., Curtis D., de Bernardis P., de Petris M., Dobbs M., Dotani T., Duband L., Duval Jm., Ducout A., Ebisawa K., Elleot T., Eriksen H., Errard J., Flauger R., Franceschet C., Fuskeland U., Ganga K., Gao J. R., Ghigna T., Grain J., Gruppuso A., Halverson N., Hargrave P., Hasebe T., Hasegawa M., Hattori M., Hazumi M., Henrot-Versille S., Hill C., Hirota Y., Hivon E., Hoang D. T., Hubmayr J., Ichiki K., Imada H., Ishino H., Jaehnig G., Kanai H., Kashima S., Kataoka Y., Katayama N., Kawasaki T., Keskitalo R., Kibayashi A., Kikuchi T., Kimura K., Kisner T., Kobayashi Y., Kogiso N., Kohri K., Komatsu E., Komatsu K., Konishi K., Krachmalnicoff N., Kuo C. L., Kurinsky N., Kushino A., Lamagna L., Lee A. T., Linder E., Maffei B., Maki M., Mangilli A., Martinez-Gonzalez E., Masi S., Matsumura T., Mennella A., Minami Y., Mistuda K., Molinari D., Montier L., Morgante G., Mot B., Murata Y., Murphy A., Nagai M., Nagata R., Nakamura S., Namikawa T., Natoli P., Nishibori T., Nishino H., Noviello F., O'Sullivan C., Ochi H., Ogawa H., Ogawa H., Ohsaki H., Ohta I., Okada N., Patanchon G., Piacentini F., Pisano G., Polenta G., Poletti D., Puglisi G., Raum C., Realini S., Remazeilles M., Sakurai H., Sakurai Y., Savini G., Sherwin B., Shinozaki K., Shiraishi M., Signorelli G., Smecher G., Stompor R., Sugai H., Sugiyama S., Suzuki A., Suzuki J., Takaku R., Takakura H., Takakura S., Taylor E., Terao Y., Thompson K. L., Thorne B., Tomasi M., Tomida H., Trappe N., Tristram M., Tsuji M., Tsujimoto M., Uozumi S., Utsunomiya S., Vittorio N., Watanabe N., Wehus I., Westbrook B., Winter B., Yamamoto R., Yamasaki N. Y., Yanagisawa M., Yoshida T., Yumoto J., Zannoni M., Zonca A.

    SPACE TELESCOPES AND INSTRUMENTATION 2018: OPTICAL, INFRARED, AND MILLIMETER WAVE   Vol. 10698   2018

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1117/12.2313432

    Web of Science

  24. Cosmic magnetism in centimeter- and meter-wavelength radio astronomy Invited Reviewed

    Akahori, Takuya; Nakanishi, Hiroyuki; Sofue, Yoshiaki; Fujita, Yutaka; Ichiki, Kiyotomo; Ideguchi, Shinsuke; Kameya, Osamu; Kudoh, Takahiro; Kudoh, Yuki; Machida, Mami; Miyashita, Yoshimitsu; Ohno, Hiroshi; Ozawa, Takeaki; Takahashi, Keitaro; Takizawa, Motokazu; Yamazaki, Dai G.

    Publications of the Astronomical Society of Japan, Advance Access     2017.12

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    DOI: 10.1093/pasj/psx123

  25. Thermal Sunyaev-Zel'dovich effect in the intergalactic medium with primordial magnetic fields Reviewed

    Minoda, Teppei; Hasegawa, Kenji; Tashiro, Hiroyuki; Ichiki, Kiyotomo; Sugiyama, Naoshi

    Physical Review D   Vol. 96 ( 12 ) page: 123525   2017.12

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  26. Constraining the contribution of galaxies and active galactic nuclei to cosmic reionization Reviewed

    Yoshiura, Shintaro; Hasegawa, Kenji; Ichiki, Kiyotomo; Tashiro, Hiroyuki; Shimabukuro, Hayato; Takahashi, Keitaro

    Monthly Notices of the Royal Astronomical Society   Vol. 471 ( 3 ) page: p.3713-3726   2017.11

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    DOI: 10.1093/mnras/stx1754

  27. Revisiting the oscillations in the cosmic microwave background angular power spectra at ell~120 in the Planck 2015 data Reviewed

    Horiguchi, Koichiro; Ichiki, Kiyotomo; Yokoyama, Jun'ichi

    Progress of Theoretical and Experimental Physics   Vol. 2017 ( 9 ) page: id.093E01   2017.9

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    DOI: 10.1093/ptep/ptx121

  28. Constraining the epoch-of-reionization model parameters with the 21-cm bispectrum Reviewed

    Shimabukuro, Hayato; Yoshiura, Shintaro; Takahashi, Keitaro; Yokoyama, Shuichiro; Ichiki, Kiyotomo

    Monthly Notices of the Royal Astronomical Society   Vol. 468 ( 2 ) page: p.1542-1550   2017.7

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  29. Weak lensing from self-ordering scalar fields Reviewed

    Saga, Shohei; Horiguchi, Kouichirou; Ichiki, Kiyotomo

    Physical Review D   Vol. 95 ( 12 ) page: id.123524   2017.6

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    DOI: 10.1103/PhysRevD.95.123524

  30. Cosmological constraints on scalar-tensor gravity and the variation of the gravitational constant Reviewed

    Ooba, Junpei; Ichiki, Kiyotomo; Chiba, Takeshi; Sugiyama, Naoshi

    Progress of Theoretical and Experimental Physics   Vol. 2017 ( 4 ) page: id.043E03   2017.4

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    DOI: 10.1093/ptep/ptx046

  31. The status of DECIGO

    Sato Shuichi, Kawamura Seiji, Ando Masaki, Nakamura Takashi, Tsubono Kimio, Araya Akito, Funaki Ikkoh, Ioka Kunihito, Kanda Nobuyuki, Moriwaki Shigenori, Musha Mitsuru, Nakazawa Kazuhiro, Numata Kenji, Sakai Shin-ichiro, Seto Naoki, Takashima Takeshi, Tanaka Takahiro, Agatsuma Kazuhiro, Aoyanagi Koh-suke, Arai Koji, Asada Hideki, Aso Yoichi, Chiba Takeshi, Ebisuzaki Toshikazu, Ejiri Yumiko, Enoki Motohiro, Eriguchi Yoshiharu, Fujimoto Masa-Katsu, Fujita Ryuichi, Fukushima Mitsuhiro, Futamase Toshifumi, Ganzu Katsuhiko, Harada Tomohiro, Hashimoto Tatsuaki, Hayama Kazuhiro, Hikida Wataru, Himemoto Yoshiaki, Hirabayashi Hisashi, Hiramatsu Takashi, Hong Feng-Lei, Horisawa Hideyuki, Hosokawa Mizuhiko, Ichiki Kiyotomo, Ikegami Takeshi, Inoue Kaiki T., Ishidoshiro Koji, Ishihara Hideki, Ishikawa Takehiko, Ishizaki Hideharu, Ito Hiroyuki, Itoh Yousuke, Kawashima Nobuki, Kawazoe Fumiko, Kishimoto Naoko, Kiuchi Kenta, Kobayashi Shiho, Kohri Kazunori, Koizumi Hiroyuki, Kojima Yasufumi, Kokeyama Keiko, Kokuyama Wataru, Kotake Kei, Kozai Yoshihide, Kudoh Hideaki, Kunimori Hiroo, Kuninaka Hitoshi, Kuroda Kazuaki, Maeda Kei-ichi, Matsuhara Hideo, Mino Yasushi, Miyakawa Osamu, Miyoki Shinji, Morimoto Mutsuko Y., Morioka Tomoko, Morisawa Toshiyuki, Mukohyama Shinji, Nagano Shigeo, Naito Isao, Nakamura Kouji, Nakano Hiroyuki, Nakao Kenichi, Nakasuka Shinichi, Nakayama Yoshinori, Nishida Erina, Nishiyama Kazutaka, Nishizawa Atsushi, Niwa Yoshito, Noumi Taiga, Obuchi Yoshiyuki, Ohashi Masatake, Ohishi Naoko, Ohkawa Masashi, Okada Norio, Onozato Kouji, Oohara Kenichi, Sago Norichika, Saijo Motoyuki, Sakagami Masaaki, Sakata Shihori, Sasaki Misao, Sato Takashi, Shibata Masaru, Shinkai Hisaaki, Somiya Kentaro, Sotani Hajime, Sugiyama Naoshi, Suwa Yudai, Suzuki Rieko, Tagoshi Hideyuki, Takahashi Fuminobu, Takahashi Kakeru, Takahashi Keitaro, Takahashi Ryutaro, Takahashi Ryuichi, Takahashi Tadayuki, Takahashi Hirotaka, Akiteru Takamori, Takano Tadashi, Taniguchi Keisuke, Taruya Atsushi, Tashiro Hiroyuki, Torii Yasuo, Toyoshima Morio, Tsujikawa Shinji, Tsunesada Yoshiki, Ueda Akitoshi, Ueda Ken-ichi, Utashima Masayoshi, Wakabayashi Yaka, Yamakawa Hiroshi, Yamamoto Kazuhiro, Yamazaki Toshitaka, Yokoyama Jun'ichi, Yoo Chul-Moon, Yoshida Shijun, Yoshino Taizoh

    11TH INTERNATIONAL LISA SYMPOSIUM   Vol. 840   2017

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    DOI: 10.1088/1742-6596/840/1/012010

    Web of Science

  32. Cosmology with the Square Kilometre Array by SKA-Japan Reviewed

    Yamauchi, Daisuke; Ichiki, Kiyotomo; Kohri, Kazunori; Namikawa, Toshiya; Oyama, Yoshihiko; Sekiguchi, Toyokazu; Shimabukuro, Hayato; Takahashi, Keitaro; Takahashi, Tomo; Yokoyama, Shuichiro; Yoshikawa, Kohji

    Publications of the Astronomical Society of Japan   Vol. 68 ( 6 ) page: id.R2 19 pp.   2016.12

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    DOI: 10.1093/pasj/psw098

  33. Primordial magnetic fields from the string network Reviewed

    Horiguchi, Kouichirou; Ichiki, Kiyotomo; Sugiyama, Naoshi

    Progress of Theoretical and Experimental Physics   Vol. 2016 ( 8 ) page: id.083E02 15 pp.   2016.8

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    DOI: 10.1093/ptep/ptw108

  34. Reconstruction of CMB temperature anisotropies with primordial CMB induced polarization in galaxy clusters Reviewed

    Liu, Guo-Chin; Ichiki, Kiyotomo; Tashiro, Hiroyuki; Sugiyama, Naoshi

    Monthly Notices of the Royal Astronomical Society: Letters   Vol. 460 ( 1 ) page: L104-L108   2016.7

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    DOI: 10.1093/mnrasl/slw085

  35. Planck constraints on scalar-tensor cosmology and the variation of the gravitational constant Reviewed

    Ooba, Junpei; Ichiki, Kiyotomo; Chiba, Takeshi; Sugiyama, Naoshi

    Physical Review D   Vol. 93 ( 12 ) page: id.122002   2016.6

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    DOI: 10.1103/PhysRevD.93.122002

  36. 21 cm line bispectrum as a method to probe cosmic dawn and epoch of reionization Reviewed

    Shimabukuro, Hayato; Yoshiura, Shintaro; Takahashi, Keitaro; Yokoyama, Shuichiro; Ichiki, Kiyotomo

    Monthly Notices of the Royal Astronomical Society   Vol. 458 ( 3 ) page: p.3003-3011   2016.5

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    DOI: 10.1093/mnras/stw482

  37. Effect of supersonic relative motion between baryons and dark matter on collapsed objects Reviewed

    Asaba, Shinsuke; Ichiki, Kiyotomo; Tashiro, Hiroyuki

    Physical Review D   Vol. 93 ( 2 ) page: id.023518   2016.1

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    DOI: 10.1103/PhysRevD.93.023518

  38. Relationship between the CMB, Sunyaev-Zel'dovich cluster counts, and local Hubble parameter measurements in a simple void model Reviewed

    Ichiki, Kiyotomo; Yoo, Chul-Moon; Oguri, Masamune

    Physical Review D   Vol. 93 ( 2 ) page: id.023529   2016.1

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    DOI: 10.1103/PhysRevD.93.023529

  39. Possible evidence for Planck-scale resonant particle production during inflation from the CMB power spectrum

    Mathews, G. J.; Gangopadhyay, M. R.; Ichiki, K.; Kajino, T.

    Physical Review D   Vol. 92 ( 12 ) page: id.123519   2015.12

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  40. Constraints on the birth of the universe and origin of cosmic dark flow Reviewed

    Mathews, G. J.; Gangopadhyay, M. R.; Garnavich, P.; Rose, B.; Ichiki, K.; Kajino, T.; Yamazaki, Dai

    International Journal of Modern Physics A   Vol. 30 ( 28n29 ) page: id. 1545022   2015.10

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    DOI: 10.1142/S0217751X15450220

  41. Weak lensing induced by second-order vector mode Reviewed

    Saga, Shohei; Yamauchi, Daisuke; Ichiki, Kiyotomo

    Physical Review D   Vol. 92 ( 6 ) page: id.063533   2015.9

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    DOI: 10.1103/PhysRevD.92.063533

  42. Studying 21cm power spectrum with one-point statistics

    Shimabukuro, Hayato; Yoshiura, Shintaro; Takahashi, Keitaro; Yokoyama, Shuichiro; Ichiki, Kiyotomo

    Monthly Notices of the Royal Astronomical Society   Vol. 451 ( 1 ) page: p.4986-4993   2015.7

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    DOI: 10.1093/mnras/stv965

  43. Magnetic field spectrum at cosmological recombination revisited

    Saga, Shohei; Ichiki, Kiyotomo; Takahashi, Keitaro; Sugiyama, Naoshi

    Physical Review D   Vol. 91 ( 12 ) page: id.123510   2015.6

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    DOI: 10.1103/PhysRevD.91.123510

  44. Primordial magnetic fields from self-ordering scalar fields Reviewed

    Horiguchi, Kouichirou; Ichiki, Kiyotomo; Sekiguchi, Toyokazu; Sugiyama, Naoshi

    Journal of Cosmology and Astroparticle Physics   Vol. 04   page: id. 007   2015.4

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    DOI: 10.1088/1475-7516/2015/04/007

  45. CMB probes on the correlated axion isocurvature perturbation Reviewed

    Kadota, Kenji; Gong, Jinn-Ouk; Ichiki, Kiyotomo; Matsubara, Takahiko

    Journal of Cosmology and Astroparticle Physics   Vol. 03   page: id. 026   2015.3

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    DOI: 10.1088/1475-7516/2015/03/026

  46. Impact of anisotropic stress of free-streaming particles on gravitational waves induced by cosmological density perturbations Reviewed

    Saga, Shohei; Ichiki, Kiyotomo; Sugiyama, Naoshi

    Physical Review D   Vol. 91 ( 2 ) page: id.024030   2015.1

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    DOI: 10.1103/PhysRevD.91.024030

  47. Test for the zero mean hypothesis in cosmology Reviewed

    Ichiki, Kiyotomo

    Physical Review D   Vol. 90   page: 123008   2014.12

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  48. Probing small-scale cosmological fluctuations with the 21 cm forest: Effects of neutrino mass, running spectral index, and warm dark matter Reviewed

    Shimabukuro, Hayato; Ichiki, Kiyotomo; Inoue, Susumu; Yokoyama, Shuichiro

    Physical Review D   Vol. 90 ( 8 ) page: 083003   2014.10

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    DOI: 10.1103/PhysRevD.90.083003

  49. Constraining primordial vector mode from B-mode polarization Reviewed

    Saga, Shohei; Shiraishi, Maresuke; Ichiki, Kiyotomo

    Journal of Cosmology and Astroparticle Physics   ( 10 ) page: 004   2014.10

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    DOI: 10.1088/1475-7516/2014/10/004

  50. The influence of primordial magnetic fields on the spherical collapse model in cosmology Reviewed

    Shibusawa, Y.; Ichiki, K.; Kadota, K.

    Journal of Cosmology and Astroparticle Physics   Vol. 08   page: 017   2014.8

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    DOI: 10.1088/1475-7516/2014/08/017

  51. Evolution of perturbations and cosmological constraints in decaying dark matter models with arbitrary decay mass products Reviewed

    Aoyama, Shohei; Sekiguchi, Toyokazu; Ichiki, Kiyotomo; Sugiyama, Naoshi

    Journal of Cosmology and Astroparticle Physics   Vol. 07   page: 021   2014.7

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    DOI: 10.1088/1475-7516/2014/07/021

  52. Cosmologically probing ultra-light particle dark matter using 21 cm signals Reviewed

    Kadota, Kenji; Mao, Yi; Ichiki, Kiyomoto; Silk, Joseph

    Journal of Cosmology and Astroparticle Physics   Vol. 06   page: 011   2014.6

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    DOI: 10.1088/1475-7516/2014/06/011

  53. CMB foreground: A concise review Invited Reviewed

    Ichiki, Kiyotomo

    Progress of Theoretical and Experimental Physics   Vol. 2014 ( 6 ) page: id.06B10918   2014.6

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    DOI: 10.1093/ptep/ptu065

  54. 21 cm fluctuations from primordial magnetic fields Reviewed

    Shiraishi, Maresuke; Tashiro, Hiroyuki; Ichiki, Kiyotomo

    Physical Review D   Vol. 89 ( 10 ) page: id.103522   2014.5

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  55. Probing quintessence potential with future cosmological surveys Reviewed

    Takeuchi, Yoshitaka; Ichiki, Kiyotomo; Takahashi, Tomo; Yamaguchi, Masahide

    Journal of Cosmology and Astroparticle Physics   Vol. 03   page: 045   2014.3

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    DOI: 10.1088/1475-7516/2014/03/045

  56. Upper limit on the amplitude of gravitational waves around 0.1Â Hz from the Global Positioning System Reviewed

    Aoyama, Shohei; Tazai, Rina; Ichiki, Kiyotomo

    Physical Review D   Vol. 89 ( 6 ) page: id.067101   2014.3

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    DOI: 10.1103/PhysRevD.89.067101

  57. CO Component Estimation Based on the Independent Component Analysis

    Kiyotomo Ichiki, Ryohei Kaji, Hiroaki Yamamoto, Tsutomu T. Takeuchi, Yasuo Fukui

    The Astrophysical Journal   Vol. 780 ( 1 ) page: 13   2014.1

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    DOI: 10.1088/0004-637X/780/1/13

  58. Constraints on the multi-lognormal magnetic fields from the observations of the cosmic microwave background and the matter power spectrum Reviewed

    Dai G. Yamazaki, Kiyotomo Ichiki, Keitaro Takahashi

    Physical Review D   Vol. 88 ( 10 ) page: 103011   2013.11

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    DOI: 10.1103/PhysRevD.88.103011

  59. Scale-dependent bias due to primordial vector fields Reviewed

    Shiraishi, Maresuke; Yokoyama, Shuichiro; Ichiki, Kiyotomo; Matsubara, Takahiko

    Monthly Notices of the Royal Astronomical Society   Vol. 432 ( 3 ) page: 2331-2338   2013.7

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  60. Lower Bounds on Magnetic Fields in Intergalactic Voids from Long-term GeV-TeV Light Curves of the Blazar Mrk 421 Reviewed

    Takahashi, Keitaro; Mori, Masaki; Ichiki, Kiyotomo; Inoue, Susumu; Takami, Hajime

    The Astrophysical Journal Letters   Vol. 771 ( 2 ) page: L42   2013.7

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  61. Generation of magnetic fields in Einstein-aether gravity Reviewed

    Saga, Shohei; Shiraishi, Maresuke; Ichiki, Kiyotomo; Sugiyama, Naoshi

    Physical Review D   Vol. 87 ( 10 ) page: 104025   2013.5

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    DOI: 10.1103/PhysRevD.87.104025

  62. Exploring the origin of the fine structures in the CMB temperature angular power spectrum Reviewed

    Kumazaki, Kohei; Ichiki, Kiyotomo; Sugiyama, Naoshi; Silk, Joseph

    Physical Review D   Vol. 87 ( 2 ) page: 023008   2013.1

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    DOI: 10.1103/PhysRevD.87.023008

  63. The search for a primordial magnetic field Reviewed

    Yamazaki, Dai G.; Kajino, Toshitaka; Mathews, Grant J.; Ichiki, Kiyotomo

    Physics Reports   Vol. 517 ( 5 ) page: 141-167   2012.8

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  64. Primordial magnetic fields with X-ray and Sunyaev-Zel'divich cluster surveys Reviewed

    Tashiro, Hiroyuki; Takahashi, Keitaro; Ichiki, Kiyotomo

    Monthly Notices of the Royal Astronomical Society   Vol. 424 ( 2 ) page: 927-932   2012.8

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    DOI: 10.1111/j.1365-2966.2012.21239.x

  65. Impact of massive neutrinos on the abundance of massive clusters Reviewed

    Ichiki, Kiyotomo; Takada, Masahiro

    Physical Review D   Vol. 85 ( 6 ) page: 063521   2012.3

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  66. Test for anisotropy in the mean of the CMB temperature fluctuation in spherical harmonic space Reviewed

    Kashino, Daichi; Ichiki, Kiyotomo; Takeuchi, Tsutomu T.

    Physical Review D   Vol. 85 ( 6 ) page: 063001   2012.3

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  67. Optimal limits on primordial magnetic fields from CMB temperature bispectrum of passive modes Reviewed

    Shiraishi, Maresuke; Nitta, Daisuke; Yokoyama, Shuichiro; Ichiki, Kiyotomo

    Journal of Cosmology and Astroparticle Physics   Vol. 03   page: 41   2012.3

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  68. Application of cross correlations between CMB and large-scale structure to constraints on the primordial non-Gaussianity Reviewed

    Takeuchi, Yoshitaka; Ichiki, Kiyotomo; Matsubara, Takahiko

    Physical Review D   Vol. 85 ( 4 ) page: 043518   2012.2

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    DOI: 10.1103/PhysRevD.85.043518

  69. Constraint on the primordial vector mode and its magnetic field generation from seven-year Wilkinson Microwave Anisotropy Probe observations Reviewed

    Ichiki, Kiyotomo; Takahashi, Keitaro; Sugiyama, Naoshi

    Physical Review D   Vol. 85 ( 4 ) page: 043009   2012.2

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    DOI: 10.1103/PhysRevD.85.043009

  70. Lower Bounds on Intergalactic Magnetic Fields from Simultaneously Observed GeV-TeV Light Curves of the Blazar Mrk 501 Reviewed

    Takahashi, Keitaro; Mori, Masaki; Ichiki, Kiyotomo; Inoue, Susumu

    The Astrophysical Journal Letters   Vol. 744 ( 1 ) page: L7 (4 pages)   2012.1

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  71. Effects of a primordial magnetic field with log-normal distribution on the cosmic microwave background Reviewed

    Yamazaki, Dai G.; Ichiki, Kiyotomo; Takahashi, Keitaro

    Physical Review D   Vol. 84 ( 12 ) page: 123006 (10 pages)   2011.12

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  72. Primordial magnetic fields generated by the non-adiabatic fluctuations at pre-recombination era Reviewed

    Maeda, Satoshi; Takahashi, Keitaro; Ichiki, Kiyotomo

    Journal of Cosmology and Astroparticle Physics   Vol. 11   page: 045 (17 pages)   2011.11

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  73. Formulation and constraints on decaying dark matter with finite mass daughter particles Reviewed

    Aoyama, Shohei; Ichiki, Kiyotomo; Nitta, Daisuke; Sugiyama, Naoshi

    Journal of Cosmology and Astroparticle Physics   Vol. 9   page: 25-45   2011.9

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  74. Computation approach for CMB bispectrum from primordial magnetic fields Reviewed

    Shiraishi, Maresuke; Nitta, Daisuke; Yokoyama, Shuichiro; Ichiki, Kiyotomo; Takahashi, Keitaro

    Physical Review D   Vol. 83 ( 12 ) page: 123523(17 pages)   2011.6

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  75. Cosmic microwave background bispectrum of tensor passive modes induced from primordial magnetic fields

    Shiraishi, Maresuke; Nitta, Daisuke; Yokoyama, Shuichiro; Ichiki, Kiyotomo; Takahashi, Keitaro

    Physical Review D   Vol. 83 ( 12 ) page: 123003(5 pages)   2011.6

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  76. CMB Bispectrum from Primordial Scalar, Vector and Tensor Non-Gaussianities Reviewed

    Shiraishi, M.; Nitta, D.; Yokoyama, S.; Ichiki, K.; Takahashi, K.

    Progress of Theoretical Physics   Vol. 125 ( 4 ) page: 795-813   2011.4

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  77. Probing early cosmic magnetic fields through pair echoes from high-redshift GRBs Reviewed

    Takahashi, Keitaro; Inoue, Susumu; Ichiki, Kiyotomo; Nakamura, Takashi

    Monthly Notices of the Royal Astronomical Society   Vol. 410 ( 4 ) page: 2741-2748   2011.2

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  78. Copula cosmology: Constructing a likelihood function Reviewed

    Sato, Masanori; Ichiki, Kiyotomo; Takeuchi, Tsutomu T.

    Phys. Rev. D   Vol. 83 ( 2 ) page: 023501(8 pages)   2011.1

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  79. Cosmic microwave background bispectrum of vector modes induced from primordial magnetic fields Reviewed

    Shiraishi, Maresuke; Nitta, Daisuke; Yokoyama, Shuichiro; Ichiki, Kiyotomo; Takahashi, Keitaro

    Phys. Rev. D   Vol. 82 ( 12 ) page: 121302(5 pages)   2010.12

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  80. Precise Estimation of Cosmological Parameters Using a More Accurate Likelihood Function Reviewed

    Sato, Masanori; Ichiki, Kiyotomo; Takeuchi, Tsutomu T.

    Physical Review Letters   Vol. 105 ( 25 ) page: 251301(4 pages)   2010.12

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  81. Analytic formulae of the CMB bispectra generated from non-Gaussianity in the tensor and vector perturbations Reviewed

    M. Shiraishi, D. Nitta, S. Yokoyama, K. Ichiki, K. Takahashi

    Phys. Rev. D   Vol. 82 ( 10 ) page: 103505(11 pages)   2010.11

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  82. Constraints on primordial non-Gaussianity from galaxy-CMB lensing cross correlation Reviewed

    Takeuchi, Yoshitaka; Ichiki, Kiyotomo; Matsubara, Takahiko

    Phys. Rev. D   Vol. 82 ( 2 ) page: 023517   2010.7

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  83. Ghost dark matter Reviewed

    Furukawa, Tomonori; Yokoyama, Shuichiro; Ichiki, Kiyotomo; Sugiyama, Naoshi; Mukohyama, Shinji

    J.Cosmo.Astropart.Phys   ( 5 ) page: 007   2010.5

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  84. Constraints on the neutrino mass and the primordial magnetic field from the matter density fluctuation parameter σ8 Reviewed

    Yamazaki, Dai G.; Ichiki, Kiyotomo; Kajino, Toshitaka; Mathews, Grant. J.

    Phys. Rev. D   Vol. 81 ( 10 ) page: 103519   2010.5

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  85. Cosmic discordance: Detection of a modulation in the primordial fluctuation spectrum Reviewed

    Ichiki, Kiyotomo; Nagata, Ryo; Yokoyama, Jun'Ichi

    Phys. Rev. D   Vol. 81 ( 8 ) page: 083010   2010.4

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  86. New constraints on the primordial magnetic field Reviewed

    Yamazaki, Dai G.; Ichiki, Kiyotomo; Kajino, Toshitaka; Mathews, Grant J.

    Phys. Rev. D   Vol. 81 ( 2 ) page: 023008   2010.1

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  87. Brute force reconstruction of the primordial fluctuation spectrum from five-year Wilkinson Microwave Anisotropy Probe observations Reviewed

    Ichiki, Kiyotomo; Nagata, Ryo

    Phys. Rev. D   Vol. 80 ( 8 ) page: 083002   2009.10

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  88. Constraints on neutrino masses from WMAP5 and BBN in the lepton asymmetric universe Reviewed

    M. Shiraishi, K. Ichikawa, K. Ichiki, N. Sugiyama and M. Yamaguchi

    J.Cosmo.Astropart.Phys.   Vol. 7   page: 005   2009.7

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  89. *Constraints on Neutrino Masses from Weak Lensing Invited Reviewed

    K. Ichiki, M Takada, T. Takahashi

    Phys. Rev. D   Vol. 79   page: 023520   2009.1

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  90. Neutrino Masses from Cosmological Probes in Interacting Neutrino Dark-Energy Models Reviewed

    K. Ichiki, Y. Y. Keum

    Journal of High Energy Physics   Vol. 06   page: 058   2008

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  91. Neutrino mass effects on vector and tensor CMB anisotropies in the presence of a primordial magnetic field Reviewed

    K. Kojima, K. Ichiki, D.G. Yamazaki, T. Kajino, G.J.Mathews

    Phys.Rev.D   Vol. 78   page: 045010   2008

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  92. Electromagnetic Properties of the Early Universe Reviewed

    K. Takahashi, K. Ichiki, N. Sugiyama

    Phys. Rev. D   Vol. 77   page: 124028   2008

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  93. *Primordial Neutrinos, Cosmological Perturbations in Interacting Dark-Energy Model: CMB and LSS Reviewed

    K. Ichiki, Y. Y. Keum

    J.Cosmo.Astropart.Phys.   Vol. 06   page: 005   2008

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  94. Cosmic microwave background constraints on a decaying cosmological term related to the thermal evolution Reviewed

    R. Nakamura, M. Hashimoto, K. Ichiki

    Phys.Rev.D   Vol. 77   page: 123511   2008

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  95. Cosmic Shear from Scalar-Induced Gravitational Waves Reviewed

    D. Sarkar, P. Serra, A. Cooray, K. Ichiki, D. Baumann

    Phys.Rev.D   Vol. 77   page: 103515   2008

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  96. Probing the Nature of the Weakest Intergalactic Magnetic Fields with the High Energy Emission of Gamma-Ray Bursts Reviewed

    K. Ichiki, S. Inoue, K. Takahashi

    Astrophys. J.   Vol. 682   page: 127   2008

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  97. Effects of a Primordial Magnetic Field on Low and High Multipoles of the CMB Reviewed

    D. G. Yamazaki, K. Ichiki, T. Kajino, G. J. Mathews

    Phys.Rev.D   Vol. 77   page: 043005   2008

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  98. Detectability of Pair Echos from Gamma-Ray Bursts and Intergalactic Magnetic Fields Reviewed

    K. Takahashi, K. Murase, K. Ichiki, S. Inoue, S. Nagataki

    Astrophys.J.   Vol. 687   page: L67   2008

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  99. Constraints on the Primordial Magnetic Field from sigma_8 Reviewed

    D. G. Yamazaki, K. Ichiki, T Kajino, G. J. Mathews

    Phys.Rev.D   Vol. 78   page: 123001   2008

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  100. Probing Intergalactic Magnetic Fields in the GLAST Era through Pair Echo Emission from TeV Blazars Reviewed

    K. Murase, K. Takahashi, S. Inoue, K. Ichiki, S. Nagataki

    Astrophys.J.   Vol. 686   page: L67   2008

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  101. Probing polarization states of primordial gravitational waves with CMB anisotropies Reviewed

    S. Saito, K. Ichiki, A. Taruya

    J.Cosmo.Astropart.Phys.   Vol. 09   page: 002   2007

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  102. Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations Reviewed

    Daniel Baumann, P.J. Steinhardt, K. Takahashi, K. Ichiki

    Phys. Rev. D   Vol. 76   page: 084019   2007

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  103. Constraints on Generalized Dark Energy from Recent Observations Reviewed

    K. Ichiki, T. Takahashi

    Phys. Rev. D   Vol. 75   page: 123002   2007

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  104. Lepton asymmetry in the primordial gravitational wave spectrum Reviewed

    K. Ichiki, M. Yamaguchi, J. Yokoyama

    Phys. Rev. D   Vol. 75   page: 084017   2007

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  105. *Cosmological Magnetic Field: a fossil of density perturbations in the early universe Reviewed

    K. Ichiki, K. Takahashi, H. Ohno, H. Hanayama, N. Sugiyama

    Science   Vol. 311   page: 787-788   2006.2

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  106. Effect of Primordial Magnetic Field on Seeds for Large Scale Structure Reviewed

    D. G. Yamazaki, K. Ichiki, K. Umezu, H. Hanayama

    Phys. Rev. D   Vol. 74   page: 123518   2006

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  107. Constraints on the evolution of the primordial magnetic field from the small scale cmb angular anisotropy Reviewed

    D. G. Yamazaki, K. Ichiki, T. Kajino, G. J. Mathews

    Astrophys. J.   Vol. 646   page: 719   2006

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  108. Observational Constraints on Accelerating Brane Cosmology with Exchange between the Bulk and Brane Reviewed

    K. Umezu, K. Ichiki, T. Kajino, G.J.Mathews, R. Nakamura, M. Yahiro

    Phys. Rev. D   Vol. 73   page: 063527   2006

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  109. Magnetic Field Generation from Cosmological Perturbations Reviewed

    K. Takahashi, K. Ichiki, H. Ohno, H. Hanayama

    Phys. Rev. Lett.   Vol. 95   page: 121301   2005

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  110. Biermann Mechanism in Primordial Supernova Remnant and Seed Magnetic Fields Reviewed

    H. Hanayama, H. Takahashi, K. Kotake, M. Oguri, K. Ichiki, H. Ohno

    Astrophys. J.   Vol. 633   page: 941   2005

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  111. Cosmological Constraints on Newton's Constant Reviewed

    K. Umezu, K. Ichiki, M. Yahiro

    Phys. Rev. D   Vol. 72   page: 044010   2005

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  112. Constraining Primordal Magnetic Field from CMB Anisotropies at Higher Multipoles Reviewed

    D. G. Yamazaki, K. Ichiki, T. Kajino

    Astrophys.J.   Vol. 625   page: L1-L4   2005

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  113. Constraints on Resonant Particle Production during Inflation from the Matter and CMB Power Spectrum Reviewed

    G. J. Mathews, D. Chung, K. Ichiki, T. Kajino, M. Orito

    Phys. Rev. D   Vol. 70   page: 083505   2004

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  114. Causal Structure and Gravitational Waves in Brane World Cosmology Reviewed

    K. Ichiki, K. Nakamura

    Phys. Rev. D   Vol. 70   page: 064017   2004

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  115. *Constraints from the Wilkinson Microwave Anisotropy Probe on decaying cold dark matter Reviewed

    K. Ichiki, M. Oguri, K. Takahashi

    Phys. Rev. Lett.   Vol. 93   page: 071302   2004

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  116. Sunyaev-Zel'dovich power spectrum with decaying cold dark matter Reviewed

    K. Takahashi, M. Oguri, K. Ichiki

    Mon.Not.Roy.Astron.Soc.   Vol. 352   page: 311-317   2004

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  117. New Classes of Cosmic Energy and Primordial Black Hole Formation Reviewed

    K. Ichiki, M. Orito and T. Kajino

    Astropart. Phys   Vol. 20   page: 499-505   2004

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  118. Disappearing Dark Matter in Brane World Cosmology: New Limits on Non Compact Extra Dimensions Reviewed

    K. Ichiki, P. M. Garnavich, T. Kajino, G. J. Mathews and M. Yahiro

    Phys. Rev. D   Vol. 68   page: 083518   2003

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  119. *Observational Constraints on Dark Radiation in Brane Cosmology Reviewed

    K. Ichiki, M. Yahiro, T. Kajino, M. Orito and G. J. Mathews

    Phys. Rev. D   Vol. 66   page: 043521   2002

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  120. Constraints on Cosmic Quintessence and Quintessensial Inflation Reviewed

    M. Yahiro, G. J. Mathews, K. Ichiki, T. Kajino and M. Orito

    Phys. Rev. D   Vol. 65   page: 063502   2002

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▼display all

Books 2

  1. 人は宇宙をどのように考えてきたか

    竹内努,市來淨與,松原隆彦( Role: Joint author)

    共立出版  2015.12 

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    Language:Japanese

  2. 星と原子

    永井智哉,市來淨與,花山秀和,桜井邦朋(監訳)( Role: Joint author)

    朝倉書店  2007.5 

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    Language:Japanese

Presentations 65

  1. Measuring the cosmological density field twice: A novel test of dark energy using CMB the quadrupole Invited International coauthorship

    2022.3.24 

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    Event date: 2022.3

    Presentation type:Oral presentation (invited, special)  

  2. 銀河団偏光と宇宙マイクロ波背景輻射四重極揺らぎを用いた暗黒エネルギーの新しい検証法 Invited

    市來淨與

    立教大学コロキウム  2021.12.20 

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    Event date: 2021.12

    Language:Japanese   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

    Venue:立教大学  

  3. 宇宙マイクロ波背景輻射観測 Invited

    市來淨與

    天文観測におけるビッグデータ解析と宇宙論パラメータの推定  2021.9.27 

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

  4. 21cm forest constraints on primordial black holes Invited International coauthorship International conference

    Kiyotomo Ichiki

    Brain-storming workshop on Primordial Black Holes and Gravitational Waves   2021.6.2 

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    Event date: 2021.6

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Yukawa Institute for Theoretical Physics, Kyoto University  

  5. The Epoch of Reionization and the Square Kilometre Array Invited

    Kiyotomo Ichiki

    4th JSPS core-to-core program, CMB Japan group seminar for young scientists  2021.5.27 

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    Event date: 2021.5

    Language:English   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

  6. 偏光スニヤエフゼルドビッチ効果を用いた宇宙論 Invited

    市來淨與

    国立天文台研究集会「(サブ)ミリ波単一鏡の革新で挑む, 天文学の未解決問題」  2021.3.31 

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

  7. Cosmology with CMB Quadrupoles Invited International conference

    Kiyotomo Ichiki

    7th Korea-Japan Workshop on Dark Energy: Maeda's Universe 

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    Event date: 2020.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Korea, Republic of  

  8. SKA宇宙論 Invited

    市來淨與

    Testing Gravity THxOBS Japan kickoff meeting 

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    Event date: 2020.8

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  9. Cosmology with CMB polarization: current status and future prospects Invited

    Kiyotomo Ichiki

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    Event date: 2019.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  10. LiteBIRD mission and Japanese activities related to the CMB foregrounds Invited International conference

    Kiyotomo Ichiki

    the Rencontres du Vietnam 

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    Event date: 2019.8

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue: International Centre for Interdisciplinary Science Education (ICISE), Quy Nhon, Vietnam   Country:Viet Nam  

  11. Current status and future prospects of CMB and 21cm cosmology Invited International conference

    Kiyotomo Ichiki

    Second international workshop "Particles, Gravitation and the Universe" (PGU 2018)  

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    Event date: 2018.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Viet Nam  

  12. CMBからの背景重力波への制限の現状と将来への展望 Invited

    市來淨與

    第17回DECIGOワークショップ 

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    Event date: 2018.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  13. Foreground related activities in Japan International conference

    Kiyotomo Ichiki

    LiteBIRD F2F meeting in Boulder 

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    Event date: 2018.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  14. 八尋先生と探った宇宙の暗黒面 Invited

    市來淨與

    八尋正信教授退職記念研究会「これまでの原子核物理学の潮流と今後の展望」 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  15. Hydrogen 21cm line and Dark Matter Invited International conference

    Kiyotomo Ichiki

    The first KMI school "Dark Matter" 

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    Event date: 2018.2 - 2018.3

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  16. The current status of the Lambda-CDM model International conference

    Kiyotomo Ichiki

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    Event date: 2018.1

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  17. SKAJPサイエンスグループの サイエンスと要望 Invited

    市來淨與

    第2回 SKA技術開発ワークショップ 

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    Event date: 2017.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  18. 宇宙初期密度揺らぎパワースペクトル再構築

    市來淨與

    スパースモデリングの深化と高次元データ駆動科学の創成2017年度第一回公開シンポジウム 

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    Event date: 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  19. 宇宙初期密度揺らぎの詳細解析 Invited

    市來淨與

    天文学におけるデータ科学的方法 

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  20. 前景放射除去アルゴリズムデルタマップ法の紹介とその性能について

    市來淨與

    物理学会年次(春季)大会 

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    Event date: 2017.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  21. Internal Template Invited International conference

    Kiyotomo ICHIKI

    B-mode from space 2017 workshop 

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    Event date: 2017.1

    Language:English   Presentation type:Oral presentation (general)  

    Venue:McGill University, Thompson House, Canada   Country:Canada  

  22. Developing a new template foreground cleaning method for the LiteBIRD experiment International conference

    Kiyotomo Ichiki

    The 3rd KMI International Symposium on Quest for the Origin of Particles and the Universe 

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    Event date: 2017.1

    Language:English   Presentation type:Poster presentation  

    Venue:Nagoya University, Japan   Country:Japan  

  23. 宇宙論的ニュートリノと大規模構造形成 Invited

    市來淨與

    秋の学校「理論と観測から迫るダークマターの正体とその分布」 

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    Event date: 2016.11

    Language:Japanese   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

    Country:Japan  

  24. 宇宙初期密度揺らぎの再構築による精密宇宙論の展開

    市來淨與

    SpM第4回領域会議 

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    Event date: 2016.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  25. Relationship between the CMB, SZ cluster number counts and local Hubble parameter measurements in a simple void model International conference

    Kiyotomo ICHIKI

    3rd Korea-Japan Workshop on Dark Energy 

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    Event date: 2016.4

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Korea, Republic of  

  26. CMB偏光観測衛星LiteBIRDによるB-mode偏光の検出に向けて

    市來淨與

    セミナー型ALMAワークショップ「磁場は星形成過程のどの進化段階を律速しているのか?」 

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    Event date: 2016.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:国立天文台三鷹キャンパス   Country:Japan  

  27. 前景放射除去への挑戦

    市來淨與

    日本物理学会第71回年次大会 

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    Event date: 2016.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東北学院大学(泉キャンパス)   Country:Japan  

  28. Foreground Removal: pixel domain International conference

    Kiyotomo Ichiki

    B-mode from Space 

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    Event date: 2015.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  29. 長波長電波による宇宙論 International conference

    市來淨與

    初代星・初代銀河研究会2015 

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    Event date: 2015.11 - 2015.12

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  30. Some Activities Related to Dark Energy and Cosmic Shear Likelihood International conference

    Ichiki, Kiyotomo

    the work shop "cosmic acceleration" 

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    Event date: 2015.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  31. Relation among the Planck CMB, SZ Cluster Count, and Local Hubble parameter Measurements in a Simple Void Model International conference

    Ichiki, Kiyotomo; Yoo, Chul-Moon; Oguri, Masamune

    IAU General Assembly, Meeting #29, #2256093 

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    Event date: 2015.8

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  32. SKAで探る宇宙の夜明けと再電離

    市來淨與

    SKA-Japanワークショップ2015 

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    Event date: 2015.3

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Country:Japan  

  33. What does the Cosmic Microwave Background tell us about the Universe International conference

    Kiyotomo Ichiki

    9th Japanese-French Frontiers of Science (JFFoS) Symposium 

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    Event date: 2015.1

    Language:English   Presentation type:Symposium, workshop panel (nominated)  

    Country:Japan  

  34. CMB 観測の現状と展望

    市來淨與

    第2回 松江現象論研究会  

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    Event date: 2014.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  35. B-mode偏光による宇宙論

    市來淨與

    金沢大 夏の学校 

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    Event date: 2014.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

    招待講師 90分x4コマ分

  36. B-mode polarization of the CMB International conference

    Kiyotomo Ichiki

    APCosPA Summer School on Cosmology and Particle Astrophysics 

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    Event date: 2014.7 - 2014.8

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  37. ビッグバンの痕跡か? BICEP2実験によるB-mode偏光観測

    市來淨與

    新潟大学セミナー 

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    Event date: 2014.4

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:新潟大学   Country:Japan  

  38. A close look into CMB anisotropies International conference

    Kiyotomo ICHIKI

    APC-YITP collaboration: Mini-Workshop on Gravitation and Cosmology  

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    Event date: 2014.2

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  39. プランク時代の観測的宇宙論

    市來淨與

    第2回観測的宇宙論ワークショップ 

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    Event date: 2013.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  40. A closer look at the CMB anisotropies International conference

    Kiyotomo ICHIKI

    Particle Physics and Cosmology after the discovery of Higgs boson 

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    Event date: 2013.10

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  41. 初期宇宙磁場と21線シグナル International conference

    市來淨與

    日本SKAサイエンス会議「宇宙磁場」2013 

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    Event date: 2013.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  42. CMB観測による観測的宇宙論の現状と展望

    市來淨與

    日本天文学会2013年秋季年会 

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    Event date: 2013.9

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Country:Japan  

  43. CMB観測を用いた観測的宇宙論の現状

    市來淨與

    基研研究会 素粒子物理学の進展2013 

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    Event date: 2013.8

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  44. Primordial Magnetic Fields and 21 cm Signal International conference

    Kiyotomo Ichiki

    SKA Science Workshop in East Asia 2013 

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    Event date: 2013.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  45. 宇宙の揺らぎと暗黒物質、暗黒輻射、暗黒重力

    市來淨與

    Workshop on Particle Physics of the Dark Universe 

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    Event date: 2013.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京大学   Country:Japan  

  46. Foreground問題について

    市來淨與

    日本SKAサイエンス会議「銀河進化と遠方宇宙」2013 

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    Event date: 2013.2

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  47. Generation of primordial magnetic fields from cosmological vector modes and the constraints from cosmological density fluctuations International conference

    Kiyotomo Ichiki

    APCTP Workshop on Astrophsics: Magnetic Fields in Astrophysics 

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    Event date: 2012.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Korea, Republic of  

  48. CO component estimation based on the independent component analysis International conference

    Kiyotomo Ichiki

    International Workshop on CMB ``Cosmic Microwave Background Radiation and Its Foreground Interstellar Components II" 

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    Event date: 2012.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  49. 独立成分分析を用いたPLANCK CMBデータからのCO成分の除去

    市來淨與

    観測的宇宙論ワークショップ 

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    Event date: 2012.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  50. some topics on HI from Japanese HI science working group for SKA-JP International conference

    Kiyotomo Ichiki

    EA-SKA-HI workshop 

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    Event date: 2012.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  51. 宇宙初期のvector modeと磁場生成に対するWMAPからの制限

    市來淨與

    日本SKAサイエンス会議「宇宙磁場」2012 

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    Event date: 2012.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  52. 宇宙観測によるニュートリノ研究の展望

    市來淨與

    日本物理学会年会 

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    Event date: 2012.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  53. 暗黒物質としてのニュートリノと宇宙論的密度揺らぎ

    市來淨與

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    Event date: 2012.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  54. CO輝線のCMBパワースペクトルへの影響と解析

    市來淨與

    CMB前景放射・初期宇宙論ワークショップ 

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    Event date: 2011.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  55. Copula Cosmology International conference

    DENET 2011 Subaru HSC Workshop 

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    Event date: 2011.3

    Language:English   Presentation type:Oral presentation (general)  

    Country:Taiwan, Province of China  

  56. Weak lensing and Massive Neutinos International conference

    From Quarks to the Cosmos: Forefront Problems at the Intersection of Astrophysics, Cosmology, Nuclear Physics and Particle Physics 

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    Event date: 2010.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Korea, Republic of  

  57. A spherical collapse model with massive neutrinos International conference

    COSMO/CosPA 2010 

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    Event date: 2010.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  58. 宇宙始原磁場

    太陽天体ダイナモ研究会 

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    Event date: 2010.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  59. Non-linear effects of massive neutrinos and cosmological constraints on their masses International conference

    38th COSPAR Scientific Assembly 

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    Event date: 2010.7

    Language:English   Presentation type:Oral presentation (general)  

  60. Constraints on neutrino masses from weak lensing and future CMB lensing-galaxy correlations International conference

    molecule-type workshop for non-linear cosmological perturbations 

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    Event date: 2009.4

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  61. Constraints on Neutrino Masses from WMAP5 and CFHTLS International conference

    Focus week : Neutrino Mass, March 2008, IPMU, Tokyo, Japan 

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    Event date: 2008.3

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  62. Unavoidable Generation of Gravitational Waves and Magnetic Fieldsfrom Primordial Density Fluctuations International conference

    Miniworkshop on Dark-Energy and Gravitational Waves 

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    Event date: 2007.7

    Language:English   Presentation type:Oral presentation (invited, special)  

  63. Generation of Large-Scale Magnetic Fields from Primordial Density Fluctuations International conference

    2006 International Symposium on Cosmology and Particle Astrophysics 

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    Event date: 2006.11

    Language:English   Presentation type:Oral presentation (invited, special)  

  64. 宇宙の磁場の起源

    市來淨與

    日本物理学会2006年秋季大会 

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    Event date: 2006.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:奈良女子大学   Country:Japan  

  65. Generation of Large-Scale Magnetic Fields from Primordial Density Fluctuations International conference

    4th COE Symposium on “Exploring New Science by Bridging Particle-Matter Hierarchy" 

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    Event date: 2006.6

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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KAKENHI (Grants-in-Aid for Scientific Research) 11

  1. Investigating the first star formation and reionization process of the Universe by MWA

    Grant number:21H04467  2021.4 - 2026.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Authorship:Coinvestigator(s) 

  2. コスミックバリアンスを越えた精密宇宙論の開拓

    2018.4 - 2023.3

    科学研究費補助金  基盤研究(C)

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    Authorship:Principal investigator 

  3. コスミックバリアンスを越えた精密宇宙論の開拓

    Grant number:18K03616  2018.4 - 2023.3

    科学研究費助成事業  基盤研究(C)

    市來 淨與

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    Authorship:Principal investigator 

    Grant amount:\4550000 ( Direct Cost: \3500000 、 Indirect Cost:\1050000 )

    本年度は主に研究計画に掲げた初期3次元密度揺らぎの再構築の方法として、遠方銀河団を通過してくるCMB光子の偏光の情報を用いる研究に取り掛かった。CMB光子は散乱する自由電子からみた宇宙のCMB温度揺らぎの4重極によって偏光する。従って、多くの遠方銀河団からの偏光を観測することにより、我々の光円錐の内側を含む、宇宙の様々な場所における大スケールの3次元的な揺らぎを推定することが可能となる。
    揺らぎの推定を行うためには、揺らぎを生成し、その揺らぎから期待される銀河団でのストークスパラメータを予言し、さらにそのストークスパラメタから逆問題として揺らぎを推定する、というアルゴリズムを実装する必要がある。
    <BR>
    現在は上記アルゴリズムを実現する低分解能の計算コードを開発し、様々な銀河団分布や様々な初期密度揺らぎの状態を用いることにより、アルゴリズムに付随する系統的な問題を精査しているところである。特に銀河団の分布の仕方で再構築の精度が大きく変わるような傾向が現在得られている。現状、低分解能の計算結果であるため今後更なる検討が必要ではあるものの、研究目的にある通り揺らぎの分散の推定ではなく、揺らぎの時間進化を直接測ることができることから、これまでのCMB観測から得られている暗黒エネルギーに関する制限を大幅に改善できる可能性を示している。この結果が高分解能の計算においても実現するかを今後調べていく必要がある。初期段階のアイデアと結果は国際研究会において発表を行った他、学内のセミナーでも発表した。
    昨年度投稿した学術論文の再投稿が遅れているが、平行して他の研究計画は着実に進捗があり、概ね順調に進んでいるといえる。
    銀河団偏光による密度揺らぎ再構築については、現在行っている高分解能化と計算の高速化を引き続き行っていく。先行研究との比較が難しい問題のため、数値計算アルゴリズムの系統誤差や間違え等に細心の注意をはらいながら進める。

  4. New Developments in Research on Cosmic Reionization and Cosmic Magnetic Fields by Long Wave Length Radio Observations

    Grant number:17H01110  2017.4 - 2020.3

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    Authorship:Coinvestigator(s) 

  5. 宇宙初期密度揺らぎの再構築による精密宇宙論の展開

    2016.4 - 2018.3

    科学研究費補助金  新学術領域研究(研究領域提案型)公募研究

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    Authorship:Principal investigator 

  6. 宇宙初期密度揺らぎの再構築による精密宇宙論の展開

    Grant number:16H01543  2016.4 - 2018.3

    新学術領域研究(研究領域提案型)

    市來 淨與

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    Authorship:Principal investigator 

    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

    2017年度は宇宙の密度揺らぎの初期パワースペクトルの再構築を行った。宇宙マイクロ波背景輻射温度揺らぎ観測衛星WMAPのデータを用いた我々の先行研究において、初期揺らぎパワースペクトルの多重極ell=120付近に、べき型のスペクトルから有意に外れた特徴的な振動の存在が指摘されている。揺らぎの起源として有力な候補であるインフレーションを考えると、シンプルなインフレーションモデルではこのような振動現れないと予想されるため、このようなパワースペクトルの詳細な解析はインフレーションモデルへの制限として有益なものである。本研究では、新しく公開された観測衛星PLANCKのデータを用いて解析を行った。WMAPとは独立な観測衛星のデータを用いることで、人工的なノイズ起源である可能性を排除するとともに、WMAP衛星では得られなかった詳細な偏光揺らぎのデータを用いることで、独立な検証を行うことができる。
    <BR>
    マルコフ連鎖モンテカルロ法を用いた詳細な解析により、以下のことを明らかにした。
    1.WMAPのデータ中に発見した特徴的な振動をPlanckのデータにおいても同じスケールに存在すること。
    2.温度揺らぎのデータだけでなく、偏光揺らぎのデータにも同じスケールに同じ周期の振動があることを確認した。ただし、偏光揺らぎのデータは温度揺らぎのデータから示唆される振幅よりも小さな振幅を示唆している。
    3.WMAPの解析時には、この振動を考慮することにより他の宇宙論パラメタの推定値が大きく変わることがあったが、PLANCKのデータではより小スケール側のデータで宇宙論パラメタが決定されているため、大きく推定値が変わることはないことが分かった。
    平成29年度が最終年度であるため、記入しない。
    平成29年度が最終年度であるため、記入しない。

  7. ダークエネルギーの理論モデル構築とその観測的検証

    Grant number:15H05890  2015.6 - 2020.3

    科学研究費助成事業  新学術領域研究(研究領域提案型)

    杉山 直, 野尻 伸一, 市來 淨與, 辻川 信二, 西澤 淳, 松原 隆彦

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    Authorship:Coinvestigator(s) 

    現在の宇宙の加速膨張を説明するために様々なモデルを考え、その観測による検証について考察した。
    まず、ダークエネルギーが、スカラー場の真空エネルギーによって担われている可能性について、通常の場合に行なっている空間の曲率を平坦に仮定するという制限を設けず、一般の曲率の場合について宇宙マイクロ波背景放射の温度ゆらぎの最新観測であるPLANCK衛星の結果を用いて、制限を与える一連の研究を行った。
    次に、ダークエネルギーが流体のようなダイナミカルな性質を持つ場合について検討を行った。この場合には、宇宙の大規模構造を反映してそのエネルギー密度に空間的な揺らぎを伴うことが予想される。そこでダークエネルギーの密度揺らぎがボイドの数分布、およびサイズ分布に及ぼす影響を解析的に評価した。
    さらに、ダークエネルギーの代替となる修正重力理論についても検討を進めた。新たに考えたモデルとしては、 F(G) 重力模型にラグランジェ乗数場を導入したもの、スカラー場の高階微分を持つ模型とF(R)重力理論を合わせた模型などである。また、展開半径というものを拡張重力理論で求め、模型に対する観測的な制限を求めた。更に、ツァリス統計と拡張重力理論の関係を考察し、その統計性に基づく模型の構成、宇宙項の量子的な問題を解決するために位相的場の理論の模型を考察したほか、磁場中や粘性流体中での重力波の伝播を研究し、宇宙論的な制限について考察した。中性子星合体からの重力波の伝搬速度が光速と矛盾がない、という観測事実から、それと矛盾しないスカラーテンソル理論に基づくダークエネルギーモデルを新たに構築し、その観測的な兆候を明らかにする研究も進めた。また、スカラーベクトルテンソル理論に基づく宇宙論、特に線形密度ゆらぎの従う基礎方程式と安定性の条件を一般的に導出し、その結果をダークエネルギーの物理に応用した。
    これまで、順調にダークエネルギーに関係する研究成果をあげることに成功してきている。今年度も、様々なモデルを提案、それらを観測的に制限することに成功してきた。
    査読付き国際学術誌に22本論文を発表し、またそれらの多くが国際共同研究であることなど、研究成果という点を評価軸とすれば、極めて順調に推移してきていると言えよう。
    最終年度となる2019年度は、これまでの研究をさらに進め、またまとめとなる国際会議を開催することを検討している。
    具体的な研究内容として、まず、近年提案されたバリオン音響振動の新しい観測量が修正重力モデルや時間変化するダークエネルギーモデルにおいて、どれほど安定した観測量として用いることができるかについて精査する。
    次に、拡張重力理論について、拡張重力に現れるスカラー粒子がダークマターとなる可能性からの検証、重力波の伝播の違いによる検証、宇宙の大規模構造形成による検証を行う。ダークマターについてはF(R)重力以外の拡張重力理論についても考察を行う。重力波の伝播についてはこれまでにスカラー・テンソル理論、F(R)重力理論、粘性流体理論について調べてきたが、他の様々な模型における伝播についても明らかにする。宇宙の大規模構造の非摂動論的研究についても繰り込み群的な手法を取り入れる。これらの知見から、アインシュタイン重力理論の背後にある量子論との整合性を持つ重力理論についての手掛かりを得る。
    さらに、スカラーベクトルテンソル理論のダークエネルギーへの応用に関する研究、特に理論の観測的な兆候について精査する。そこでは、理論的に有効な模型の絞り込みを行い、さらに今後得られる重力波の最新の観測データと、宇宙背景放射、大規模構造、重力レンズ、さらに超新星などのデータを用いた統合的な解析を行い、モデルの選別を行っていく。それに加えて、これら宇宙の加速膨張のモデルをブラックホールや中性子星のような強重力天体に適用し、理論の兆候を重力波の観測から探る可能性について研究していく。

  8. 電波による中性水素探査を用いた銀河および宇宙大規模構造の起源と進化の解明

    2012.4 - 2017.3

    科学研究費補助金  基盤研究(B)

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    Authorship:Principal investigator 

  9. 重力レンズ効果における尤度関数の精密決定

    2010.4 - 2012.3

    科学研究費補助金  特定領域研究,課題番号:22012004

    市來 淨與

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    Authorship:Principal investigator 

  10. 宇宙論観測で迫る、揺らぎの非ガウス性

    2010

    科学研究費補助金  基盤研究(B)

    杉山直

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    Authorship:Coinvestigator(s) 

  11. 宇宙構造形成のおけるニュートリノの役割の解明およびその質量の決定

    2008.4 - 2010.3

    科学研究費補助金  科学研究費補助金 若手研究(B); 課題番号21740177

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    Authorship:Principal investigator 

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Teaching Experience (On-campus) 1

  1. Fundamentals of Advanced Physics 2

    2020

Teaching Experience (Off-campus) 4

  1. マイクロ波背景輻射および中性水素21cm線による観測的宇宙論

    2021.12 立教大学)

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    Level:Graduate (liberal arts) 

  2. 長波長電波天文学による観測的宇宙論(集中講義)

    2015.4 - 2016.3 Kyoto University)

  3. 一般相対論

    2008.4 - 2009.3 青山学院大学)

  4. 相対論

    2008.4 - 2009.3 青山学院大学)

 

Social Contribution 8

  1. NHK文化センター 名古屋教室 宇宙講座2021 「宇宙と物質の起源」

    Role(s):Lecturer

    2021.9

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    Audience: General

    Type:Lecture

  2. NHK文化センター 名古屋教室 宇宙講座2020 「宇宙と物質の起源」

    Role(s):Lecturer

    2020.9

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    Audience: General

    Type:Lecture

  3. NHK文化センター 名古屋教室 宇宙講座2019 「空洞の宇宙」

    Role(s):Lecturer

    2019.4

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    Audience: General

    Type:Lecture

  4. NHK文化センター 名古屋教室 宇宙講座2018 「つぶつぶの宇宙」

    Role(s):Lecturer

    2018.4

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    Audience: General

    Type:Seminar, workshop

  5. NHK文化センター 名古屋教室 宇宙講座2017 「宇宙にみちる水素」

    Role(s):Lecturer

    2017.4

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    Audience: General

    Type:Lecture

  6. 梶田隆章先生講演会&宇宙論を楽しもうDay

    Role(s):Appearance, Lecturer

    2016.10

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    Audience: High school students, College students, Graduate students, Teachers, Guardians, Media

    Type:Lecture

  7. NHK文化センター名古屋教室

    Role(s):Lecturer

    2016.4

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    Type:Lecture

    最新宇宙学:名古屋大学発
    「宇宙の晴れ上がりと宇宙の夜明け」

  8. NHKカルチャー「不連続の宇宙」

    Role(s):Lecturer

    2015.5

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    Type:Lecture

    宇宙の晴れ上がりと宇宙の夜明け

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