Updated on 2021/05/18

写真a

 
SUGIYAMA, Naoshi
 
Organization
Nagoya University Trustee / Vice President Director
Title
Director
Contact information
メールアドレス

Degree 1

  1. Doctor of Science ( 1989.4   Hiroshima University ) 

Research Interests 6

  1. Thermal History of the Universe

  2. Large Scale Structure of the Universe

  3. Cosmic Microwave Background Radiation

  4. Observational Cosmology

  5. Cosmology

  6. Theoretical Astrophysics

Research Areas 2

  1. Others / Others  / Astronomy

  2. Others / Others  / Elementary Particle/Atomic Nucleus/Cosmic Ray/Space Physics

Research History 5

  1. Institute for the Physics and Mathematics of the Universe

    2007.10

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    Country:Japan

  2. Graduate School of Science, Nagoya University, Professor

    2006.4

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    Country:Japan

  3. Division of Theoretical Astrophysics, National Astronomical Observatory, Japan, Professor

    2000.4 - 2006.3

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    Country:Japan

  4. Graduate School of Sicence, Kyoto University, Associate Professor

    1996.4 - 2000.3

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    Country:Japan

  5. Faculty of Science, University of Tokyo, Research Associate

    1991.4 - 1996.3

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    Country:Japan

Education 3

  1. Hiroshima University   Graduate School, Division of Natural Science   Physics

    1986.4 - 1989.4

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    Country: Japan

  2. Waseda University   Faculty of Science and Enginnering   Physics

    1984.4 - 1986.3

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    Country: Japan

  3. Waseda University   Faculty of Science and Engineering   Department of Physics

    1980.4 - 1984.3

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    Country: Japan

Professional Memberships 3

  1. Astronomical Society of Japan   Deputy President

    2011.1 - 2012.12

  2. The Physical Society of Japan

    2005.4 - 2007.3

  3. International Astronomical Union

Committee Memberships 5

  1. 京都大学研究連携基盤基盤評価委員会委員   委員長  

    2015.4 - 2020.7   

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    Committee type:Other

  2. 文部科学省科学官   科学官  

    2014.4 - 2018.3   

  3. 東京大学宇宙線研究所運営委員   委員  

    2012.4 - 2014.3   

  4. 自然科学研究機構国立天文台運営会議   委員  

    2008.4 - 2012.3   

  5. 日本学術会議   連携会員  

    2006.10 - 2020.9   

Awards 3

  1. Hayashi Chushiro Prize

    2009.3   Japan Astronomical Society  

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    Country:Japan

  2. JSPS Prize

    2007.3   JSPS  

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    Country:Japan

  3. Nishinomiya Yukawa Prize

    2001.11   Nishinomiya City  

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    Country:Japan

 

Papers 94

  1. Weak lensing measurement of filamentary structure with the SDSS BOSS and Subaru Hyper Suprime-Cam data

    Kondo Hiroto, Miyatake Hironao, Shirasaki Masato, Sugiyama Naoshi, Nishizawa Atsushi J.

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 495 ( 4 ) page: 3695 - 3704   2020.7

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

    DOI: 10.1093/mnras/staa1390

    Web of Science

  2. Second data release of the Hyper Suprime-Cam Subaru Strategic Program

    Aihara Hiroaki, AlSayyad Yusra, Ando Makoto, Armstrong Robert, Bosch James, Egami Eiichi, Furusawa Hisanori, Furusawa Junko, Goulding Andy, Harikane Yuichi, Hikage Chiaki, Ho Paul T. P., Hsieh Bau-Ching, Huang Song, Ikeda Hiroyuki, Imanishi Masatoshi, Ito Kei, Iwata Ikuru, Jaelani Anton T., Kakuma Ryota, Kawana Kojiro, Kikuta Satoshi, Kobayashi Umi, Koike Michitaro, Komiyama Yutaka, Li Xiangchong, Liang Yongming, Lin Yen-Ting, Luo Wentao, Lupton Robert, Lust Nate B., MacArthur Lauren A., Matsuoka Yoshiki, Mineo Sogo, Miyatake Hironao, Miyazaki Satoshi, More Surhud, Murata Ryoma, Namiki Shigeru V, Nishizawa Atsushi J., Oguri Masamune, Okabe Nobuhiro, Okamoto Sakurako, Okura Yuki, Ono Yoshiaki, Onodera Masato, Onoue Masafusa, Osato Ken, Ouchi Masami, Shibuya Takatoshi, Strauss Michael A., Sugiyama Naoshi, Suto Yasushi, Takada Masahiro, Takagi Yuhei, Takata Tadafumi, Takita Satoshi, Tanaka Masayuki, Terai Tsuyoshi, Toba Yoshiki, Uchiyama Hisakazu, Utsumi Yousuke, Wang Shiang-Yu, Wang Wenting, Yamada Yoshihiko

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 71 ( 6 )   2019.12

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

    DOI: 10.1093/pasj/psz103

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  3. Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). X. Discovery of 35 Quasars and Luminous Galaxies at 5.7 <= z <= 7.0

    Matsuoka Yoshiki, Iwasawa Kazushi, Onoue Masafusa, Kashikawa Nobunari, Strauss Michael A., Lee Chien-Hsiu, Imanishi Masatoshi, Nagao Tohru, Akiyama Masayuki, Asami Naoko, Bosch James, Furusawa Hisanori, Goto Tomotsugu, Gunn James E., Harikane Yuichi, Ikeda Hiroyuki, Izumi Takuma, Kawaguchi Toshihiro, Kato Nanako, Kikuta Satoshi, Kohno Kotaro, Komiyama Yutaka, Koyama Shuhei, Lupton Robert H., Minezaki Takeo, Miyazaki Satoshi, Murayama Hitoshi, Niida Mana, Nishizawa Atsushi J., Noboriguchi Akatoki, Oguri Masamune, Ono Yoshiaki, Ouchi Masami, Price Paul A., Sameshima Hiroaki, Schulze Andreas, Silverman John D., Sugiyama Naoshi, Tait Philip J., Takada Masahiro, Takata Tadafumi, Tanaka Masayuki, Tang Ji-Jia, Toba Yoshiki, Utsumi Yousuke, Wang Shiang-Yu, Yamashita Takuji

    ASTROPHYSICAL JOURNAL   Vol. 883 ( 2 )   2019.10

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

    DOI: 10.3847/1538-4357/ab3c60

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  4. Planck 2015 constraints on spatially-flat dynamical dark energy models

    Ooba Junpei, Ratra Bharat, Sugiyama Naoshi

    ASTROPHYSICS AND SPACE SCIENCE   Vol. 364 ( 10 )   2019.10

  5. 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:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1142/S0218271818450013

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  6. Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data

    Hikage Chiaki, Oguri Masamune, Hamana Takashi, More Surhud, Mandelbaum Rachel, Takada Masahiro, Kohlinger Fabian, Miyatake Hironao, Nishizawa Atsushi J., Aihara Hiroaki, Armstrong Robert, Bosch James, Coupon Jean, Ducout Anne, Ho Paul, Hsieh Bau-Ching, Komiyama Yutaka, Lanusse Francois, Leauthaud Alexie, Lupton Robert H., Medezinski Elinor, Mineo Sogo, Miyama Shoken, Miyazaki Satoshi, Murata Ryoma, Murayama Hitoshi, Shirasaki Masato, Sifon Cristobal, Simet Melanie, Speagle Joshua, Spergel David N., Strauss Michael A., Sugiyama Naoshi, Tanaka Masayuki, Utsumi Yousuke, Wang Shiang-Yu, Yamada Yoshihiko

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 71 ( 2 )   2019.4

  7. Discovery of the First Low-luminosity Quasar at z > 7

    Matsuoka Yoshiki, Onoue Masafusa, Kashikawa Nobunari, Strauss Michael A., Iwasawa Kazushi, Lee Chien-Hsiu, Imanishi Masatoshi, Nagao Tohru, Akiyama Masayuki, Asami Naoko, Bosch James, Furusawa Hisanori, Goto Tomotsugu, Gunn James E., Harikane Yuichi, Ikeda Hiroyuki, Izumi Takuma, Kawaguchi Toshihiro, Kato Nanako, Kikuta Satoshi, Kohno Kotaro, Komiyama Yutaka, Koyama Shuhei, Lupton Robert H., Minezaki Takeo, Miyazaki Satoshi, Murayama Hitoshi, Niida Mana, Nishizawa Atsushi J., Noboriguchi Akatoki, Oguri Masamune, Ono Yoshiaki, Ouchi Masami, Price Paul A., Sameshima Hiroaki, Schulze Andreas, Shirakata Hikari, Silverman John D., Sugiyama Naoshi, Tait Philip J., Takada Masahiro, Takata Tadafumi, Tanaka Masayuki, Tang Ji-Jia, Toba Yoshiki, Utsumi Yousuke, Wang Shiang-Yu, Yamashita Takuji

    ASTROPHYSICAL JOURNAL LETTERS   Vol. 872 ( 1 )   2019.2

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

    DOI: 10.3847/2041-8213/ab0216

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  8. Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). V. Quasar Luminosity Function and Contribution to Cosmic Reionization at z=6

    Matsuoka Yoshiki, Strauss Michael A., Kashikawa Nobunari, Onoue Masafusa, Iwasawa Kazushi, Tang Ji-Jia, Lee Chien-Hsiu, Imanishi Masatoshi, Nagao Tohru, Akiyama Masayuki, Asami Naoko, Bosch James, Furusawa Hisanori, Goto Tomotsugu, Gunn James E., Harikane Yuichi, Ikeda Hiroyuki, Izumi Takuma, Kawaguchi Toshihiro, Kato Nanako, Kikuta Satoshi, Kohno Kotaro, Komiyama Yutaka, Lupton Robert H., Minezaki Takeo, Miyazaki Satoshi, Murayama Hitoshi, Niida Mana, Nishizawa Atsushi J., Noboriguchi Akatoki, Oguri Masamune, Ono Yoshiaki, Ouchi Masami, Price Paul A., Sameshima Hiroaki, Schulze Andreas, Shirakata Hikari, Silverman John D., Sugiyama Naoshi, Tait Philip J., Takada Masahiro, Takata Tadafumi, Tanaka Masayuki, Toba Yoshiki, Utsumi Yousuke, Wang Shiang-Yu, Yamashita Takuji

    ASTROPHYSICAL JOURNAL   Vol. 869 ( 2 )   2018.12

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

    DOI: 10.3847/1538-4357/aaee7a

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  9. Planck 2015 Constraints on the Non-flat XCDM Inflation Model

    Ooba Junpei, Ratra Bharat, Sugiyama Naoshi

    ASTROPHYSICAL JOURNAL   Vol. 869 ( 1 )   2018.12

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    DOI: 10.3847/1538-4357/aaec6f

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  10. 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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  11. Planck 2015 Constraints on the Nonflat phi CDM Inflation Model

    Ooba Junpei, Ratra Bharat, Sugiyama Naoshi

    ASTROPHYSICAL JOURNAL   Vol. 866 ( 1 )   2018.10

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    DOI: 10.3847/1538-4357/aadcf3

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  12. Stellar mass dependence of the 21-cm signal around the first star and its impact on the global signal

    Tanaka Toshiyuki, Hasegawa Kenji, Yajima Hidenobu, Kobayashi Masato I. N., Sugiyama Naoshi

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 480 ( 2 ) page: 1925-1937   2018.10

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

    DOI: 10.1093/mnras/sty1967

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  13. Planck 2015 Constraints on the Non-flat Lambda CDM Inflation Model

    Ooba Junpei, Ratra Bharat, Sugiyama Naoshi

    ASTROPHYSICAL JOURNAL   Vol. 864 ( 1 )   2018.9

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    DOI: 10.3847/1538-4357/aad633

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  14. Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). IV. Discovery of 41 Quasars and Luminous Galaxies at 5.7 <= z <= 6.9

    Matsuoka Yoshiki, Iwasawa Kazushi, Onoue Masafusa, Kashikawa Nobunari, Strauss Michael A., Lee Chien-Hsiu, Imanishi Masatoshi, Nagao Tohru, Akiyama Masayuki, Asami Naoko, Bosch James, Furusawa Hisanori, Goto Tomotsugu, Gunn James E., Harikane Yuichi, Ikeda Hiroyuki, Izumi Takuma, Kawaguchi Toshihiro, Kato Nanako, Kikuta Satoshi, Kohno Kotaro, Komiyama Yutaka, Lupton Robert H., Minezaki Takeo, Miyazaki Satoshi, Morokuma Tomoki, Murayama Hitoshi, Niida Mana, Nishizawa Atsushi J., Oguri Masamune, Ono Yoshiaki, Ouchi Masami, Price Paul A., Sameshima Hiroaki, Schulze Andreas, Shirakata Hikari, Silverman John D., Sugiyama Naoshi, Tait Philip J., Takada Masahiro, Takata Tadafumi, Tanaka Masayuki, Tang Ji-Jia, Toba Yoshiki, Utsumi Yousuke, Wang Shiang-Yu, Yamashita Takuji

    ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES   Vol. 237 ( 1 )   2018.7

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    DOI: 10.3847/1538-4365/aac724

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  15. 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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  16. The Hyper Suprime-Cam SSP Survey: Overview and survey design

    Aihara Hiroaki, Arimoto Nobuo, Armstrong Robert, Arnouts Stephane, Bahcall Neta A., Bickerton Steven, Bosch James, Bundy Kevin, Capak Peter L., Chan James H. H., Chiba Masashi, Coupon Jean, Egami Eiichi, Enoki Motohiro, Finet Francois, Fujimori Hiroki, Fujimoto Seiji, Furusawa Hisanori, Furusawa Junko, Goto Tomotsugu, Goulding Andy, Greco Johnny P., Greene Jenny E., Gunn James E., Hamana Takashi, Harikane Yuichi, Hashimoto Yasuhiro, Hattori Takashi, Hayashi Masao, Hayashi Yusuke, Helminiak Krzysztof G., Higuchi Ryo, Hikage Chiaki, Ho Paul T. P., Hsieh Bau-Ching, Huang Kuiyun, Huang Song, Ikeda Hiroyuki, Imanishi Masatoshi, Inoue Akio K., Iwasawa Kazushi, Iwata Ikuru, Jaelani Anton T., Jian Hung-Yu, Kamata Yukiko, Karoji Hiroshi, Kashikawa Nobunari, Katayama Nobuhiko, Kawanomoto Satoshi, Kayo Issha, Koda Jin, Koike Michitaro, Kojima Takashi, Komiyama Yutaka, Konno Akira, Koshida Shintaro, Koyama Yusei, Kusakabe Haruka, Leauthaud Alexie, Lee Chien-Hsiu, Lin Lihwai, Lin Yen-Ting, Lupton Robert H., Mandelbaum Rachel, Matsuoka Yoshiki, Medezinski Elinor, Mineo Sogo, Miyama Shoken, Miyatake Hironao, Miyazaki Satoshi, Momose Rieko, More Anupreeta, More Surhud, Moritani Yuki, Moriya Takashi J., Morokuma Tomoki, Mukae Shiro, Murata Ryoma, Murayama Hitoshi, Nagao Tohru, Nakata Fumiaki, Niida Mana, Niikura Hiroko, Nishizawa Atsushi J., Obuchi Yoshiyuki, Oguri Masamune, Oishi Yukie, Okabe Nobuhiro, Okamoto Sakurako, Okura Yuki, Ono Yoshiaki, Onodera Masato, Onoue Masafusa, Osato Ken, Ouchi Masami, Price Paul A., Pyo Tae-Soo, Sako Masao, Sawicki Marcin, Shibuya Takatoshi, Shimasaku Kazuhiro, Shimono Atsushi, Shirasaki Masato, Silverman John D., Simet Melanie, Speagle Joshua, Spergel David N., Strauss Michael A., Sugahara Yuma, Sugiyama Naoshi, Suto Yasushi, Suyu Sherry H., Suzuki Nao, Tait Philip J., Takada Masahiro, Takata Tadafumi, Tamura Naoyuki, Tanaka Manobu M., Tanaka Masaomi, Tanaka Masayuki, Tanaka Yoko, Terai Tsuyoshi, Terashima Yuichi, Toba Yoshiki, Tominaga Nozomu, Toshikawa Jun, Turner Edwin L., Uchida Tomohisa, Uchiyama Hisakazu, Umetsu Keiichi, Uraguchi Fumihiro, Urata Yuji, Usuda Tomonori, Utsumi Yousuke, Wang Shiang-Yu, Wang Wei-Hao, Wong Kenneth C., Yabe Kiyoto, Yamada Yoshihiko, Yamanoi Hitomi, Yasuda Naoki, Yeh Sherry, Yonehara Atsunori, Yuma Suraphong

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.1

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    DOI: 10.1093/pasj/psx066

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  17. Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). II. Discovery of 32 quasars and luminous galaxies at 5.7 < z <= 6.8

    Matsuoka Yoshiki, Onoue Masafusa, Kashikawa Nobunari, Iwasawa Kazushi, Strauss Michael A., Nagao Tohru, Imanishi Masatoshi, Lee Chien-Hsiu, Akiyama Masayuki, Asami Naoko, Bosch James, Foucaud Sebastien, Furusawa Hisanori, Goto Tomotsugu, Gunn James E., Harikane Yuichi, Ikeda Hiroyuki, Izumi Takuma, Kawaguchi Toshihiro, Kikuta Satoshi, Kohno Kotaro, Komiyama Yutaka, Lupton Robert H., Minezaki Takeo, Miyazaki Satoshi, Morokuma Tomoki, Murayama Hitoshi, Niida Mana, Nishizawa Atsushi J., Oguri Masamune, Ono Yoshiaki, Ouchi Masami, Price Paul A., Sameshima Hiroaki, Schulze Andreas, Shirakata Hikari, Silverman John D., Sugiyama Naoshi, Tait Philip J., Takada Masahiro, Takata Tadafumi, Tanaka Masayuki, Tang Ji-Jia, Toba Yoshiki, Utsumi Yousuke, Wang Shiang-Yu

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.1

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    DOI: 10.1093/pasj/psx046

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  18. Hyper Suprime-Cam: System design and verification of image quality

    Miyazaki Satoshi, Komiyama Yutaka, Kawanomoto Satoshi, Doi Yoshiyuki, Furusawa Hisanori, Hamana Takashi, Hayashi Yusuke, Ikeda Hiroyuki, Kamata Yukiko, Karoji Hiroshi, Koike Michitaro, Kurakami Tomio, Miyama Shoken, Morokuma Tomoki, Nakata Fumiaki, Namikawa Kazuhito, Nakaya Hidehiko, Nariai Kyoji, Obuchi Yoshiyuki, Oishi Yukie, Okada Norio, Okura Yuki, Tait Philip, Takata Tadafumi, Tanaka Yoko, Tanaka Masayuki, Terai Tsuyoshi, Tomono Daigo, Uraguchi Fumihiro, Usuda Tomonori, Utsumi Yousuke, Yamada Yoshihiko, Yamanoi Hitomi, Aihara Hiroaki, Fujimori Hiroki, Mineo Sogo, Miyatake Hironao, Oguri Masamune, Uchida Tomohisa, Tanaka Manobu M., Yasuda Naoki, Takada Masahiro, Murayama Hitoshi, Nishizawa Atsushi J., Sugiyama Naoshi, Chiba Masashi, Futamase Toshifumi, Wang Shiang-Yu, Chen Hsin-Yo, Ho Paul T. P., Liaw Eric J. Y., Chiu Chi-Fang, Ho Cheng-Lin, Lai Tsang-Chih, Lee Yao-Cheng, Jeng Dun-Zen, Iwamura Satoru, Armstrong Robert, Bickerton Steve, Bosch James, Gunn James E., Lupton Robert H., Loomis Craig, Price Paul, Smith Steward, Strauss Michael A., Turner Edwin L., Suzuki Hisanori, Miyazaki Yasuhito, Muramatsu Masaharu, Yamamoto Koei, Endo Makoto, Ezaki Yutaka, Ito Noboru, Kawaguchi Noboru, Sofuku Satoshi, Taniike Tomoaki, Akutsu Kotaro, Dojo Naoto, Kasumi Kazuyuki, Matsuda Toru, Imoto Kohei, Miwa Yoshinori, Suzuki Masayuki, Takeshi Kunio, Yokota Hideo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.1

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

    DOI: 10.1093/pasj/psx063

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  19. First data release of the Hyper Suprime-Cam Subaru Strategic Program

    Aihara Hiroaki, Armstrong Robert, Bickerton Steven, Bosch James, Coupon Jean, Furusawa Hisanori, Hayashi Yusuke, Ikeda Hiroyuki, Kamata Yukiko, Karoji Hiroshi, Kawanomoto Satoshi, Koike Michitaro, Komiyama Yutaka, Lang Dustin, Lupton Robert H., Mineo Sogo, Miyatake Hironao, Miyazaki Satoshi, Morokuma Tomoki, Obuchi Yoshiyuki, Oishi Yukie, Okura Yuki, Price Paul A., Takata Tadafumi, Tanaka Manobu M., Tanaka Masayuki, Tanaka Yoko, Uchida Tomohisa, Uraguchi Fumihiro, Utsumi Yousuke, Wang Shiang-Yu, Yamada Yoshihiko, Yamanoi Hitomi, Yasuda Naoki, Arimoto Nobuo, Chiba Masashi, Finet Francois, Fujimori Hiroki, Fujimoto Seiji, Furusawa Junko, Goto Tomotsugu, Goulding Andy, Gunn James E., Harikane Yuichi, Hattori Takashi, Hayashi Masao, Helminiak Krzysztof G., Higuchi Ryo, Hikage Chiaki, Ho Paul T. P., Hsieh Bau-Ching, Huang Kuiyun, Huang Song, Imanishi Masatoshi, Iwata Ikuru, Jaelani Anton T., Jian Hung-Yu, Kashikawa Nobunari, Katayama Nobuhiko, Kojima Takashi, Konno Akira, Koshida Shintaro, Kusakabe Haruka, Leauthaud Alexie, Lee Chien-Hsiu, Lin Lihwai, Lin Yen-Ting, Mandelbaum Rachel, Matsuoka Yoshiki, Medezinski Elinor, Miyama Shoken, Momose Rieko, More Anupreeta, More Surhud, Mukae Shiro, Murata Ryoma, Murayama Hitoshi, Nagao Tohru, Nakata Fumiaki, Niida Mana, Niikura Hiroko, Nishizawa Atsushi J., Oguri Masamune, Okabe Nobuhiro, Ono Yoshiaki, Onodera Masato, Onoue Masafusa, Ouchi Masami, Pyo Tae-Soo, Shibuya Takatoshi, Shimasaku Kazuhiro, Simet Melanie, Speagle Joshua, Spergel David N., Strauss Michael A., Sugahara Yuma, Sugiyama Naoshi, Suto Yasushi, Suzuki Nao, Tait Philip J., Takada Masahiro, Terai Tsuyoshi, Toba Yoshiki, Turner Edwin L., Uchiyama Hisakazu, Umetsu Keiichi, Urata Yuji, Usuda Tomonori, Yeh Sherry, Yuma Suraphong

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.1

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

    DOI: 10.1093/pasj/psx081

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  20. Mean Energy Density of Photogenerated Magnetic Fields Throughout the EoR

    Durrive Jean-Baptiste, Tashiro Hiroyuki, Langer Mathieu, Sugiyama Naoshi

    PEERING TOWARDS COSMIC DAWN   Vol. 12 ( S333 ) page: 60-63   2018

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

    DOI: 10.1017/S1743921317011309

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

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

    PHYSICAL REVIEW D   Vol. 96 ( 12 )   2017.12

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

    DOI: 10.1103/PhysRevD.96.123525

    Web of Science

  22. Mean energy density of photogenerated magnetic fields throughout the Epoch of Reionization Reviewed

    Durrive Jean-Baptiste, Tashiro Hiroyuki, Langer Mathieu, Sugiyama Naoshi

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 472 ( 2 ) page: 1649-1658   2017.12

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    DOI: 10.1093/mnras/stx2007

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  23. The FMOS-COSMOS Survey of Star-forming Galaxies at Z similar to 1.6. V: Properties of Dark Matter Halos Containing Ha Emitting Galaxies Reviewed

    Kashino Daichi, More Surhud, Silverman John D., Daddi Emanuele, Renzini Alvio, Sanders David B., Rodighiero Giulia, Puglisi Annagrazia, Kajisawa Masaru, Valentino Francesco, Kartaltepe Jeyhan S., Le Fevre Olivier, Nagao Tohru, Arimoto Nobuo, Sugiyama Naoshi

    ASTROPHYSICAL JOURNAL   Vol. 843 ( 2 )   2017.7

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    DOI: 10.3847/1538-4357/aa789d

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  24. 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   ( 4 )   2017.4

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    DOI: 10.1093/ptep/ptx046

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  25. THE FMOS-COSMOS SURVEY OF STAR-FORMING GALAXIES AT z similar to 1.6. IV. EXCITATION STATE AND CHEMICAL ENRICHMENT OF THE INTERSTELLAR MEDIUM

    Kashino D., Silverman J. D., Sanders D., Kartaltepe J. S., Daddi E., Renzini A., Valentino F., Rodighiero G., Juneau S., Kewley L. J., Zahid H. J., Arimoto N., Nagao T., Chu J., Sugiyama N., Civano F., Ilbert O., Kajisawa M., Le Fevre O., Maier C., Masters D., Miyaji T., Onodera M., Puglisi A., Taniguchi Y.

    ASTROPHYSICAL JOURNAL   Vol. 835 ( 1 )   2017.1

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    DOI: 10.3847/1538-4357/835/1/88

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  26. 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

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  27. SUBARU HIGH-z EXPLORATION OF LOW-LUMINOSITY QUASARS (SHELLQs). I. DISCOVERY OF 15 QUASARS AND BRIGHT GALAXIES AT 5.7 < z < 6.9 Reviewed

    Matsuoka Yoshiki, Onoue Masafusa, Kashikawa Nobunari, Iwasawa Kazushi, Strauss Michael A., Nagao Tohru, Imanishi Masatoshi, Niida Mana, Toba Yoshiki, Akiyama Masayuki, Asami Naoko, Bosch James, Foucaud Sebastien, Furusawa Hisanori, Goto Tomotsugu, Gunn James E., Harikane Yuichi, Ikeda Hiroyuki, Kawaguchi Toshihiro, Kikuta Satoshi, Komiyama Yutaka, Lupton Robert H., Minezaki Takeo, Miyazaki Satoshi, Morokuma Tomoki, Murayama Hitoshi, Nishizawa Atsushi J., Ono Yoshiaki, Ouchi Masami, Price Paul A., Sameshima Hiroaki, Silverman John D., Sugiyama Naoshi, Tait Philip J., Takada Masahiro, Takata Tadafumi, Tanaka Masayuki, Tang Ji-Jia, Utsumi Yousuke

    ASTROPHYSICAL JOURNAL   Vol. 828 ( 1 )   2016.9

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    DOI: 10.3847/0004-637X/828/1/26

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  28. Primordial magnetic fields from the string network Reviewed

    Horiguchi Kouichirou, Ichiki Kiyotomo, Sugiyama Naoshi

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   ( 8 )   2016.8

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    DOI: 10.1093/ptep/ptw108

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  29. 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   Vol. 460 ( 1 ) page: L104-L108   2016.7

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    DOI: 10.1093/mnrasl/slw085

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  30. 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 )   2016.6

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    DOI: 10.1103/PhysRevD.93.122002

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  31. The FMOS-COSMOS Survey of Star-forming Galaxies at z~1.6. III. Survey Design, Performance, and Sample Characteristics Reviewed

    J.D. Silverman, D. Sanders, J.S. Kartaltepe, N. Arimoto, A. Renzini, G. Rodighiero, E. Daddi, J. Zahid, T. Nagao, L.J. Kewley, S.J. Lilly, Naoshi Sugiyama, I. Baronchelli, P. Capak, C.M. Carollo, J. Chu, G. Hasinger, O. Ilbert, S. Juneau, M. Kajisawa, A.M. Koekemoer, K. Kovac, O. Le Fèvre, D. Masters, H.J. McCracken, M. Onodera, A. Schulze, N. Scoville, V. Strazzullo, Y. Taniguchi

    The Astrophysical Journal Supplement Series   Vol. 220   page: id. 12 (25pp)   2015.9

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    DOI: 10.1088/0067-0049/220/1/12

  32. Magnetic field spectrum at cosmological recombination revisited Reviewed

    Shohei Saga, Kiyotomo Ichiki, Keitaro Takahashi, Naoshi Sugiyama

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

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    DOI: 10.1103/PhysRevD.91.123510

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

    Kouichirou Horiguchi, Kiyotomo Ichiki, Toyokazu Sekiguchi, Naoshi Sugiyama

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

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

  34. Stellar mass assembly of brightest cluster galaxies at late times Reviewed

    Takahiro Inagaki, Yen-Ting Lin, Hung-JIn Huang, Bau-Ching Hsieh, Naoshi Sugiyama

    Monthly Notices of the Royal Astronomical Society   Vol. 446 ( 1 ) page: 1107-1114   2015.1

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    DOI: 10.1093/mnras/stu2126

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

    Shohei Saga, Kiyotomo Ichiki, Naoshi Sugiyama

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

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    DOI: 10.1103/PhysRevD.91.024030

  36. Probing large-scale filaments with HI and 3 HeII Reviewed

    Y. Takeuchi, S. Zaroubi, N. Sugiyama

    Monthly Notices of the Royal Astronomical Society   Vol. 444 ( 3 ) page: 2236-2250   2014.11

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    DOI: 10.1093/mnras/stu1550

  37. Implications of the B-mode polarization measurement for direct detection of inflationary gravitational waves Reviewed

    S. Kuroyanagi, S. Tsujikawa, T. Chiba, N. Sugiyama

    Physical Review D   Vol. 90 ( 6 ) page: 063513   2014.9

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    DOI: 10.1103/PhysRevD.90.063513

  38. The FMOS-COSMOS Survey of Star-forming Galaxies at z ~ 1.6. II. The Mass-Metallicity Relation and the Dependence on Star Formation Rate and Dust Extinction Reviewed

    H. J. Zahid, D. Kashino, J. D. Silverman, L. J. Kewley, E. Daddi, A. Renzini, G. Rodighiero, T. Nagao, N. Arimoto, D. B. Sanders, J. Kartaltepe, S. J. Lilly, C. Maier, M. J. Geller, P. Capak, C. M. Carollo, J. Chu, G. Hasinger, O. Ilbert, M. Kajisawa, A. M. Koekemoer, K. Kovac, O. Le Fevre, D. Masters, H. J. McCracken, M. Onodera, N. Scoville, V. Strazzullo, Naoshi Sugiyama, Y. Taniguchi, The COSMOS Team

    The Astrophysical Journal   Vol. 792 ( 1 ) page: 75   2014.9

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    DOI: 10.1088/0004-637X/792/1/75

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

    S. Aoyama, T. Sekiguchi, K. Ichiki, N. Sugiyama

    Journal of Cosmology and Astroparticle Physics   ( 07 ) page: 021   2014.7

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

  40. Introduction to temperature anisotropies of Cosmic Microwave Background radiation Invited Reviewed

    Naoshi Sugiyama

    Progress of Theoretical and Experimental Physics   ( 06B101 )   2014.4

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    DOI: 10.1093/ptep/ptu073

  41. Cosmological signatures of tilted isocurvature perturbations: reionization and 21cm fluctuations Reviewed

    T. Sekiguchi, H. Tashiro, J. Silk, N. Sugiyama

    Journal of Cosmology and Astroparticle Physics   ( 03 ) page: 001   2014.3

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    DOI: 10.1088/1475-7516/2014/03/001

  42. The effect of primordial black holes on 21-cm fluctuations Reviewed

    Hiroyuki Tashiro, Naoshi Sugiyama

    Monthly Notices of the Royal Astronomical Society   Vol. 435 ( 4 ) page: 3001-3008   2013.11

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    DOI: 10.1093/mnras/stt1493

  43. Optimal constraint on gNL from CMB Invited Reviewed

    Toyokazu Sekiguchi, Naoshi Sugiyama

    Journal of Cosmology and Astroparticle Physics   Vol. 09   page: 002   2013.9

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    DOI: 10.1088/1475-7516/2013/09/002

  44. Understanding the nature of luminous red galaxies (LRGs): connecting LRGs to central and satellite subhaloes Reviewed

    Shogo Masaki, Chiaki Hikage, Masahiro Takada, David Spergel, Naoshi Sugiyama

    Monthly Notices of the Royal Astronomical Society   Vol. 43 ( 4 ) page: 3506-3522   2013.8

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    DOI: 10.1093/mnras/stt981

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

    Shohei Saga, Maresuke Shiraichi, Kiyotomo Ichiki, Naoshi Sugiyama

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

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    DOI: 10.1103/PhysRevD.87.104025

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

    Kohei Kumazaki, Kiyotomo Ichiki, Naoshi Sugiyama, Joseph Silk

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

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    DOI: 10.1103/PhysRevD.87.023008

  47. Shadows of multi-black holes: Analytic exploration Reviewed

    Akifumi Yumoto, Daisuke Nitta, Takeshi Chiba, Naoshi Sugiyama

    Physical Review D   Vol. 86 ( 10 ) page: 103001   2012.11

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    DOI: 10.1103/PhysRevD.86.103001

  48. Stochastic gravitational wave background originating from halo mergers Reviewed

    Takahiro Inagaki, Keitaro Takahashi, Naoshi Sugiyama

    Physical Review D   Vol. 85 ( 10 ) page: 104051   2012.5

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    DOI: 10.1103/PhysRevD.85.104051

  49. Ionized bubble number count as a probe of non-Gaussianity Reviewed

    Hiroyuki Tashiro, Naoshi Sugiyama

    Monthly Notices of the Royal Astronomical Society,   Vol. 420 ( 1 ) page: 441-446   2012.2

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    DOI: 10.1111/j.1365-2966.2011.20049.x

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

    Kiyotomo Ichik, Keitaro Takahashi, Naoshi Sugiyama

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

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    DOI: 10.1103/PhysRevD.85.043009

  51. Fine features in the primordial power spectrum Reviewed

    Kohei Kumazak, Shuichiro Yokoyama, Naoshi Sugiyama

    Journal of Cosmology and Astroparticle Physics   Vol. 12   page: 008   2011.12

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    DOI: 10.1088/1475-7516/2011/12/008

  52. Modification of the halo mass function by kurtosis associated with primordial non-Gaussianity Reviewed

    Shuichiro Yokoyama, Naoshi Sugiyama, Saleem Zaroubi, Joseph Silk

    Monthly Notices of the Royal Astronomical Society   Vol. 417 ( 2 ) page: 1074-1087   2011.10

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    We study the halo mass function in the presence of a kurtosis type of primordial non-Gaussianity. The kurtosis corresponds to the trispectrum as defined in Fourier space. The primordial trispectrum is commonly characterized by two parameters, tau_NL and g_NL. We focus on tau_NL which is an important parameter to test the physics of multifield inflation models.

    DOI: 10.1111/j.1365-2966.2011.19323.x

  53. Shadows of colliding black holes Reviewed

    Daisuke Nitta, Takeshi Chiba, Naoshi Sugiyama

    Physical Review D   Vol. 84 ( 6 )   2011.9

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    We compute the shadows of colliding black holes using the Kastor-Traschen cosmological multiblack hole solution that is an exact solution describing the collision of maximally charged black holes with a positive cosmological constant. We find that in addition to the shadow of each black hole, an eyebrowlike structure appears as the black holes come close to each other. These features can be used as probes to find the multiblack hole system at the final stage of its merger process.

    DOI: 10.1103/PhysRevD.84.063008

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

    Shohei Aoyama, Kiyotomo Ichiki, Daisuke Nitta, Naoshi Sugiyama

    Journal of Cosmology and Astroparticle Physics   Vol. 2011 ( 09 ) page: 025   2011.9

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    DOI: 10.1088/1475-7516/2011/09/025

  55. Modification of the halo mass function by kurtosis associated with primordial non-Gaussianity Reviewed

    Shuichiro Yokoyama, Naoshi Sugiyama, Saleem Zaroubi, Joseph Silk

    Monthly Notices of the Royal Astronomical Society   Vol. 417 ( 2 ) page: 1074-1087   2011.8

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    DOI: 10.1111/j.1365-2966.2011.19323.x

  56. Observational Search for PeV-EeV Tau Neutrino from GRB081203A Reviewed

    Y. Aita, Y. Asaoka, T. chonan, M. Jobashi, M. Masuda, Y. Morino, K. Noda, M. Sasaki, J. Asoh, N. Ishikawa, S. Ogawa, J.G. Lenearned, S. Matsuno, S. Olsen, P-M. Binder, J. Hamilton, N. Sugiyama, Y. Watanabe

    The Astrophysical Journal Letters   Vol. 736 ( 1 ) page: L12-L16   2011.7

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    We report the first observational search for tau neutrinos (ντ) from gamma-ray bursts (GRBs) using one of the Ashra light collectors. The Earth-skimming ντ technique of imaging Cherenkov τ showers was applied as a detection method. We set stringent upper limits on the ντ fluence in PeV-EeV region for 3780 s (between 2.83 and 1.78 hr before) and another 3780 s (between 21.2 and 22.2 hr after) surrounding GRB081203A triggered by the Swift satellite. This first search for PeV-EeV ντ complements other experiments in energy range and methodology, and suggests the prologue of "multi-particle astronomy" with a precise determination of time and location.

  57. Sunyaev-Zel'dovich power spectrum produced by primordial magnetic fields Reviewed

    Hiroyuki Tashiro, Naoshi Sugiyama

    Monthly Notices of the Royal Astronomical Society   Vol. 411 ( 2 ) page: 1284-1292   2011.2

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  58. Prospects for direct detection of inflationary gravitational waves by next generation interferometric detectors Reviewed

    Sachiko Kuroyanagi, Takeshi Chiba, Naoshi Sugiyama

    Physical Review D   Vol. 83 ( 4 )   2011.2

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    We study the potential impact of detecting the inflationary gravitational wave background by the future space-based gravitational wave detectors, such as DECIGO and BBO. The signal-to-noise ratio of each experiment is calculated for chaotic/natural/hybrid inflation models by using the precise predictions of the gravitational wave spectrum based on numerical calculations. We investigate the dependence of each inflation model on the reheating temperature which influences the amplitude and shape of the spectrum, and find that the gravitational waves could be detected for chaotic/natural inflation models with high reheating temperature. From the detection of the gravitational waves, a lower bound on the reheating temperature could be obtained. The implications of this lower bound on the reheating temperature for particle physics are also discussed.

    DOI: 10.1103/PhysRevD.83.043514

  59. Non-Gaussian Error Contribution to Likelihood Analysis of the Matter Power Spectrum Reviewed

    RYuichi Takahashi, Naoki Yoshida, MAsahiro Takada, Takahiko Matsubara, Naoshi Sugiyama, Issha Kayo, Takahiro Nishimichi, Shun Saito, Atsushi Taruya

    Astrophysical Journal   Vol. 726 ( 1 ) page: 7   2011.1

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    We study the sample variance of the matter power spectrum for the standard Λ cold dark matter universe. We use a total of 5000 cosmological N-body simulations to study in detail the distribution of best-fit cosmological parameters and the baryon acoustic peak positions. The obtained distribution is compared with the results from the Fisher matrix analysis with and without including non-Gaussian errors. For the Fisher matrix analysis, we compute the derivatives of the matter power spectrum with respect to cosmological parameters using directly full nonlinear simulations. We show that the non-Gaussian errors increase the unmarginalized errors by up to a factor of five for k max = 0.4 h Mpc–1 if there is only one free parameter, provided other parameters are well determined by external information. On the other hand, for multi-parameter fitting, the impact of the non-Gaussian errors is significantly mitigated due to severe parameter degeneracies in the power spectrum. The distribution of the acoustic peak positions is well described by a Gaussian distribution, with its width being consistent with the statistical interval predicted from the Fisher matrix. We also examine systematic bias in the best-fit parameter due to the non-Gaussian errors. The bias is found to be smaller than the 1σ statistical error for both the cosmological parameters and the acoustic scale positions.

  60. Halo occupation distribution of massive galaxies since z= 1 Reviewed

    Y. Matsuoka, S. Masaki, K. Kawara, Naoshi Suigyama

    Monthly Notices of the Royal Astronomical Society   Vol. 410 ( 1 ) page: 548-558   2011.1

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    We present a clustering analysis of ˜60 000 massive (stellar mass M★ > 1011 M&#559;) galaxies out to z= 1 drawn from 55.2 deg2 of the UKIRT Infrared Deep Sky Survey (UKIDSS) and the Sloan Digital Sky Survey (SDSS) II Supernova Survey. Strong clustering is detected for all the subsamples of massive galaxies characterized by different stellar masses (M★= 1011.0-11.5 M&#559;, 1011.5-12.0 M&#559;) or rest-frame colours (blue: U-V < 1.0, red: U-V > 1.0). We find that more mature (more massive or redder) galaxies are more clustered, which implies that the more mature galaxies have started stellar-mass assembly earlier within the highly biased region where the structure formation has also started earlier. By means of halo occupation distribution (HOD) models fitted to the observed angular correlation function, we infer the properties of the underlying host dark haloes. We find that the estimated bias factors and host halo masses are systematically larger for galaxies with larger stellar masses, which is consistent with the general agreement that the capability of hosting massive galaxies depends strongly on halo mass. The estimated effective halo masses are ˜1014 M&#559;, which gives the stellar-mass to halo-mass ratios of ˜0.003. The observed evolution of bias factors indicates rapid evolution of spatial distributions of cold dark matter relative to those traced by the massive galaxies, while the transition of host halo masses might imply that the fractional mass growth rate of haloes is less than those of stellar systems. The inferred halo masses and high fractions of central galaxies indicate that the massive galaxies in the current sample are possibly equivalent to central galaxies of galaxy clusters.

  61. Systematic study of gravitational waves from galaxy mergers Reviewed

    Takahiro Inagaki, Keitaro Takahashi, Shogo Masaki, Naoshi Sugiyama

    Physical Review D   Vol. 82 ( 12 ) page: 124007   2010.12

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    A systematic study of gravitational waves from galaxy mergers, through N-body simulations, was performed. In particular, we investigated the relative importance of galaxy components (disk, bulge and halo) and effects of initial relative velocity, relative angular momentum and mass ratio of the galaxies. We found that the features of light curve of gravitational waves, such as peak width and luminosity, are reliably simulated with particle numbers larger than ˜104. Dominant contribution to gravitational wave emission came from the halo component, while peak luminosity amounted to 1031erg/sec for the collision of two halos with mass 3.8×1012h-1M&#559;. We also found that the initial relative velocity in the direction of the initial separation did not significantly affect gravitational wave emission, while the initial relative angular momentum broadened the peak width and suppressed the luminosity. Mass dependence of the peak luminosity was also investigated, and we obtained evidence that the luminosity is proportional to the cubic mass when the scaling relation is satisfied. This behavior was considered by a simple analysis.

  62. Ghost dark matter Reviewed

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

    Journal of Cosmology and Astroparticle Physics   Vol. 2010 ( 05 ) page: 007   2010.5

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    We revisit ghost dark matter, the possibility that ghost condensation may serve as an alternative to dark matter. In particular, we investigate the Friedmann-Robertson-Walker (FRW) background evolution and the large-scale structure (LSS) in the ΛGDM universe, i.e. a late-time universe dominated by a cosmological constant and ghost dark matter. The FRW background of the ΛGDM universe is indistinguishable from that of the standard ΛCDM universe if Mgtrsim1eV, where M is the scale of spontaneous Lorentz breaking. From the LSS we find a stronger bound: Mgtrsim10eV. For smaller M, ghost dark matter would have non-negligible sound speed after the matter-radiation equality, and thus the matter power spectrum would significantly differ from observation. These bounds are compatible with the phenomenological upper bound M<100GeV known in the literature.

  63. DECIGO and DECIGo pathfinder Reviewed

    Masaki Ando, Seiji kawamura, et al.

    Classical and Quantum Gravity   Vol. 27 ( 8 ) page: 084010   2010.4

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    A space gravitational-wave antenna, DECIGO (DECI-hertz interferometer Gravitational wave Observatory), will provide fruitful insights into the universe, particularly on the formation mechanism of supermassive black holes, dark energy and the inflation of the universe. In the current pre-conceptual design, DECIGO will be comprising four interferometer units; each interferometer unit will be formed by three drag-free spacecraft with 1000 km separation. Since DECIGO will be an extremely challenging mission with high-precision formation flight with long baseline, it is important to increase the technical feasibility before its planned launch in 2027. Thus, we are planning to launch two milestone missions. DECIGO pathfinder (DPF) is the first milestone mission, and key components for DPF are being tested on ground and in orbit. In this paper, we review the conceptual design and current status of DECIGO and DPF.

  64. Forecast constraints on inflation from combined CMB and gravitational wave direct detection experiments Reviewed

    Sachiko Kuroyanagi, Christopher Gordon, Joseph Silk, Naoshi Sugiyama

    Physical Review D   Vol. 81 ( 8 ) page: 083524   2010.4

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    We study how direct detection of the inflationary gravitational wave background constrains inflationary parameters and complements CMB polarization measurements. The error ellipsoids calculated using the Fisher information matrix approach with Planck and the direct detection experiment, Big Bang Observer (BBO), show different directions of parameter degeneracy, and the degeneracy is broken when they are combined. For a slow-roll parametrization, we show that BBO could significantly improve the constraints on the tensor-to-scalar ratio compared with Planck alone. We also look at a quadratic and a natural inflation model. In both cases, if the temperature of reheating is also treated as a free parameter, then the addition of BBO can significantly improve the error bars. In the case of natural inflation, we find that the addition of BBO could even partially improve the error bars of a cosmic variance-limited CMB experiment.

  65. Numerical study of primordial magnetic field amplification by inflation-produced gravitational waves Reviewed

    Sachiko Kuroyanagi, Hiroyuki Tashiro, Naoshi Sugiyama

    Physical Review D   Vol. 81 ( 2 ) page: 023510   2010.1

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    We numerically study the interaction of inflation-produced magnetic fields with gravitational waves, both of which originate from quantum fluctuations during inflation. The resonance between the magnetic field perturbations and the gravitational waves has been suggested as a possible mechanism for magnetic field amplification. However, some analytical studies suggest that the effect of the inflationary gravitational waves is too small to provide significant amplification. Our numerical study shows more clearly how the interaction affects the magnetic fields and confirms the weakness of the influence of the gravitational waves. We present an investigation based on the magnetohydrodynamic approximation and take into account the differences of the Alfven speed.

  66. Simulations of Wide-Field Weak Lensing Surveys. I. Basic Statistics and Non-Gaussian Effects Reviewed

    Masanori Sato, Takashi Hamana, Ryuichi takahashi, Masahiro Takada, Naoki Yoshida, Takahiko Matsubara, Naoshi Sugiyama

    The Astrophysical Journal, Volume   Vol. 701 ( 2 ) page: 945-954   2009.8

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    We study the lensing convergence power spectrum and its covariance for a standard ΛCDM cosmology. We run 400 cosmological N-body simulations and use the outputs to perform a total of 1000 independent ray-tracing simulations. We compare the simulation results with analytic model predictions. The semianalytic model based on Smith et al. fitting formula underestimates the convergence power by ~ 30% at arcmin angular scales. For the convergence power spectrum covariance, the halo model reproduces the simulation results remarkably well over a wide range of angular scales and source redshifts. The dominant contribution at small angular scales comes from the sample variance due to the number fluctuations of halos in a finite survey volume. The signal-to-noise ratio for the convergence power spectrum is degraded by the non-Gaussian covariances by up to a factor of 5 for a weak lensing survey to zs ~ 1. The probability distribution of the convergence power spectrum estimators, among the realizations, is well approximated by a χ2 distribution with broadened variance given by the non-Gaussian covariance, but has a larger positive tail. The skewness and kurtosis have non-negligible values especially for a shallow survey. We argue that a prior knowledge on the full distribution may be needed to obtain an unbiased estimate on the ensemble-averaged band power at each angular scale from a finite volume survey.

  67. Simulations of Baryon Acoustic Oscillations. II. Covariance Matrix of the Matter Power Spectrum Reviewed

    Ryuichi Takahashi, Naoki Yoshida, Masahiro Takada, Takahiko Matsubara, Naoshi Sugiyama, Issha Kayo, Atsushi J. Nishizawa, Takahiro Nishimichi, Shun Saito, Atsushi Taruya

    The Astrophysical Journal   Vol. 700 ( 1 ) page: 479-490   2009.7

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    We use 5000 cosmological N-body simulations of 1 h -3 Gpc3 box for the concordance ΛCDM model in order to study the sampling variances of a nonlinear matter power spectrum. We show that the non-Gaussian errors can be important even on large length scales relevant for baryon acoustic oscillations (BAOs). Our findings are the following: (1) the non-Gaussian errors degrade the cumulative signal-to-noise ratios (S/Ns) for the power spectrum amplitude by up to a factor of 2 and 4 for redshifts z = 1 and 0, respectively; (2) there is little information on the power spectrum amplitudes in the quasi-nonlinear regime, confirming the previous results; (3) the distribution of power spectrum estimators at BAO scales, among the realizations, is well approximated by a Gaussian distribution with variance that is given by the diagonal covariance component. (4) For the redshift-space power spectrum, the degradation in S/N by non-Gaussian errors is mitigated due to nonlinear redshift distortions; (5) for an actual galaxy survey, the additional shot noise contamination compromises the cosmological information inherent in the galaxy power spectrum, but also mitigates the impact of non-Gaussian errors. The S/N is degraded by up to 30% for a Wide-Field Fiber-Fed Optical Multi-Object Spectrograph-type survey; (6) the finite survey volume causes additional non-Gaussian errors via the correlations of long-wavelength fluctuations with the fluctuations we want to measure, further degrading the S/N values by about 30% even at high redshift z = 3.

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

    Maresuke Shiraishi, Kazuhide Ichikawa, Kiyotomo Ichiki, Naoshi Sugiyama, Masahidee Yamaguchi

    Journal of Cosmology and Astroparticle Physics   Vol. 07   page: 005   2009.7

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    In this paper, we put constraints on neutrino properties such as mass mν and degeneracy parameters ξi from WMAP5 data and light element abundances by using a Markov chain Monte Carlo (MCMC) approach. In order to take consistently into account the effects of the degeneracy parameters, we run the Big Bang Nucleosynthesis code for each value of ξi and the other cosmological parameters to estimate the Helium abundance, which is then used to calculate CMB anisotropy spectra instead of treating it as a free parameter. We find that the constraint on mν is fairly robust and does not vary very much even if the lepton asymmetry is allowed, and is given by ∑mν < 1.3 eV (95%C.L.).

  69. DECIGO pathfinder Reviewed

    Ando, Masaki; Kawamura, Seiji; Sato, Shuichi; 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; Wataru@Kokuyama; 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

    Classical and Quantum Gravity   Vol. 26 ( 9 ) page: 094019   2009.5

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    DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory), which is a future space gravitational wave antenna. DECIGO is expected to provide fruitful insights into the universe, particularly about dark energy, the formation mechanism of supermassive black holes and the inflation of the universe. Since DECIGO will be an extremely challenging mission, which will be formed by three drag-free spacecraft with 1000 km separation, it is important to increase the technical feasibility of DECIGO before its planned launch in 2024. Thus, we are planning to launch two milestone missions: DPF and pre-DECIGO. In this paper, we review the conceptual design and current status of the first milestone mission, DPF.

  70. The 21-cm signature of early relic HII regions Reviewed

    Midori Tokutani, Naoki Yoshida, S. Peng Oh, Naoshi Sugiyama

    Monthly Notices of the Royal Astronomical Society   Vol. 395 ( 2 ) page: 777-780   2009.5

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    We calculate the spin temperature and 21-cm brightness of early HII regions around the first stars. We use outputs from cosmological radiation-hydrodynamics simulations of the formation and evolution of early HII regions. In the pre-re-ionization era, HII regions around massive primordial stars have diameters of a few kpc. The gas within the HII regions is almost fully ionized, but begins recombining after the central stars die off. The relic HII regions are then seen as bright emission sources in hydrogen 21 cm. We make brightness temperature maps of the HII regions, accounting for radiative coupling with Lyman α photons in a simplified manner. The spin temperature in the relic HII region is close to the gas kinetic temperature, generally several hundred to several thousand degrees. We show that the relic HII region can be as bright as δTb ~ 100mK in differential temperature against the cosmic microwave background for an angular resolution of subarcseconds. While individual early HII patches will not be identified by currently planned radio telescopes, the collective fluctuations from early HII regions might imprint signatures in the 21-cm background.

  71. The Sunyaev-Zel'dovich effect and Faraday rotation contributions of galaxy groups to the CMB angular power spectrum Reviewed

    Hiroyuki Tashiro, Joseph Silk, Mathieu Langer, Naoshi Sugiyama

    Monthly Notices of the Royal Astronomical Society   Vol. 392 ( 4 ) page: 1421-1428   2009.2

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  72. Modeling Nonlinear Evolution of Baryon Acoustic Oscillations: Convergence Regime of N-body Simulations and Analytic Models Reviewed

    Publications of the Astronomical Society of Japan   Vol. 61 ( 2 ) page: 321-332   2009.2

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    We used a series of cosmological N-body simulations and various analytic models to study the evolution of the matter power spectrum in real space in a Λ cold dark matter universe. We compared the results of N-body simulations against three analytical model predictions; standard perturbation theory, renormalized perturbation theory, and a closure approximation. We included the effects from a finite simulation box size under comparison. We determined the values of the maximum wavenumbers, klim1% and klim3%, below which the analytic models and the simulation results agree with accuracy to within 1 and 3 percent. We then provided a simple empirical function that describes the convergence regime determined by comparisons between our simulations and the analytical models. We found that if we use the Fourier modes within the convergence regime alone, the characteristic scale of baryon acoustic oscillations can be determined with an accuracy of 1% from future surveys with a volume of a few h-3Gpc3 at z ∼ 1 or z ∼ 3 in the absence of any systematic distortion of the power spectrum.

  73. Optimal location of two laser-interferometric detectors for gravitational wave backgrounds at 100 MHz Reviewed

    Classical and Quantum Gravity   Vol. 25 ( 22 ) page: 225011   2008.11

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  74. Simulations of baryon acoustic oscillations - I. Growth of large-scale density fluctuations Reviewed

    Ryuichi Takahashi, Naoki Yoshida, Takahiko Matsubara, Naoshi Sugiyama, Issha Kayo, Takahiro Nishimichi, Akihito Shirata, Atsushi Taruya, Shun Saito, Kazuhiro Yahata, Yasushi Suto

    Monthly Notices of the Royal Astronomical Society   Vol. 389 ( 4 ) page: 1675-1682   2008.10

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  75. Search for a Stochastic Background of 100-MHz gravitational Waves with Laser Interferometers Reviewed

    Tomotada Akutsu, Seiji Kawamura, Atsushi Nishizawa, Koji Arai, Kazuhiro Yamamoto, Daisuke Tatsumi, Shigeo Nagano, Erina Nishida, Takeshi Chiba, Ryuichi Takahashi, Naoshi Sugiyama, Titsuhiro Fukushima, Toshitaka Yamazaki, Masa-Katsu Fujimoto

    Physical Review Letters   Vol. 101 ( 10 ) page: 101101   2008.9

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  76. Constraints on primordial black holes by distortions of the cosmic microwave background Reviewed

    Hiroyuki Tashiro, Naoshi Sugiyama

    Physical Review D   Vol. 78 ( 2 ) page: 023004   2008.7

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  77. Electromagnetic properties of the early universe Reviewed

    Keitaro Takahashi, Kiyotomo ichiki, Naoshi Sugiyama

    Physical Review D   Vol. 77 ( 12 ) page: 124028   2008.6

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  78. Cosmic Microwave Background-Weak Lensing Correlation: Analytical and Numerical Study of Nonlinearity and Implications for Dark Energy Reviewed

    Atsushi Nishizawa, Eiichiro Komatsu, Naoki Yoshida, Ryuichi Takahashi, Naoshi Sugiyama

    The Astrophysical Journal Letters   Vol. 676 ( 2 ) page: L93-L96   2008.4

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  79. Analyzing WMAP Observation by Quantum Gravity Reviewed

      Vol. 119 ( 2 ) page: 253-262   2008.2

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  80. Laser-interferometric detectors for gravitational wave backgrounds at 100MHz: Detector design and sensitivity Reviewed

    Atsushi Nishizawa, Seiji Kawamura, Tomotada Akutsu, Koji Arai, Kazuhiro Yamamoto, Daisuke Tatsumi, Erina Nishida, Masa-Aki Sakagami, Takeshi Chiba, Ryuichi Takahashi, Naoshi Sugiyama

      Vol. 77 ( 2 ) page: 022002   2008.1

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  81. Heating of the intergalactic medium by primordial miniquasars Reviewed

    Saleem Zaroubi,Rajat M. Thomas, Naoshi Sugiyama, Joseph Silk

    Monthly Notices of the Royal Astronomical Society   Vol. 375 ( 4 ) page: 1269-1279   2007.3

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  82. *The Epoch of Reionization Reviewed

    Andrew J. Benson, Naoshi Sugiyama, Adi Nusser, Cedric G. Lacey

    Mon. Not. Roy. Astro. Soc.   Vol. 369   page: 1055-1080   2006.7

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  83. Possibility of Ultra High-Energy Cosmic Rays from the Giant Flare in SGR 1806-20 Reviewed

    Katsuaki Asano, Ryo Yamazaki, Naoshi Sugiyama

      Vol. 58 ( 1 ) page: L7-L10   2006.2

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  84. Probing Primordial Magnetic Fields with the 21-cm Fluctuations Reviewed

    Hiroyuki Tashiro, Naoshi Sugiyama

    Mon. Not. Roy. Astro. Soc.   Vol. 372   page: 1060-1068   2006

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  85. Nonlinear Evolution of Cosmic Magnetic Fields and Cosmic Microwave Background Reviewed

      Vol. D73   page: 083512   2006

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  86. Cosmological Magnetic Field: A Fossil of Density Perturbations in the Early Universe Reviewed

    Sicence   Vol. 311 ( 5762 ) page: 827-829   2006

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  87. Early Reionization with Primordial Magnetic Fields Reviewed

    Hiroyuki Tashiro, Naoshi Sugiyama

    Mon. Not. Roy. Astro. Soc.   Vol. 368   page: 965-970   2006

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  88. Hard X-ray and Gamma-ray Emission Induced by Ultra-High Energy Protons in Cluster Accretion Shocks Reviewed

    Susumu Inoue, Felix A. Aharonian, Naoshi Sugiyama

    Astrophysical Journal Letter   Vol. 628   page: L9-L12   2005

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  89. Classifying the Future of Universes with Dark Energy Reviewed

    Takeshi Chiba, Ryuichi Takahashi, Naoshi Sugiyama

    Class. Quant. Grav.   Vol. 22   page: 3745-3758   2005

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  90. Patchy He II reionization and the physical state of the IGM Reviewed

    Liron Gleser, Adi Nusser, Andrew J. Benson, Hiroshi Ohno, Naoshi Sugiyama

    Mon. Not. Roy. Astro. Soc.   Vol. 361   page: 1399-1414   2005

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  91. *Isocurvature Fluctuations Induce Early Star Formation Reviewed

    Naoshi Sugiyama, Saleem Zaroubi, Joseph Silk

    Mon. Not. Roy. Astro. Soc.   Vol. 354   page: 543-548   2004

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  92. WMAP constraints on scalar-tensor cosmology and the variation of the gravitational constant Reviewed

    Ryo Nagata, Takeshi Chiba, Naoshi Sugiyama

    Physical Review   Vol. D69   page: 083512   2004

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  93. Gravitational Waves from Supermassive Black Hole Coalescence in a Hierarchical Galaxy Formation Model Reviewed

    Motohiro Enoki, Kaiki T. Inoue, Masahiro Nagashima, Naoshi Sugiyama

    Astrophysical Journal   Vol. 615   page: 19-28   2004

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  94. Does Positronium Form in the Universe? Reviewed

    Takeshi Chiba, Naoshi Sugiyama

    JCAP   Vol. 06   page: 003   2004

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Books 11

  1. 宇宙の始まりに何が起きたのか ビッグバンの残光「宇宙マイクロ波背景放射」

    杉山 直( Role: Sole author)

    講談社  2020.6  ( ISBN:978-4065204931

  2. 宇宙の物質はどのようにできたのか 素粒子から生命へ

    杉山 直、徳宿克夫、市川温子、平野哲文、櫻井博儀、坂井南美、小久保英一郎、大石雅寿、田村裕和、伊藤好孝( Role: Joint author)

    日本評論社  2015.3  ( ISBN:978-4-535-78743-8

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    Language:Japanese

  3. 素粒子物理学ハンドブック

    ( Role: Joint author)

    朝倉書店  2010.10 

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    Language:Japanese

  4. 宇宙のしくみ

    杉山直、吉田直紀、John Silverman、高田昌広、杉本茂樹、村山斉( Role: Joint author)

    学研  2010.7 

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    Language:Japanese

  5. Relativity

    Naoshi Sugiyama( Role: Sole author)

    Kodansya  2010.4  ( ISBN:978-4-06-157209-6

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    Language:Japanese

  6. *シリーズ 現代の天文学 宇宙論 II

    池内了、梅村雅之、北山哲、小松英一郎、杉山直、須藤靖、千葉柾司、西亮一、二間瀬敏史、松原隆彦( Role: Joint author)

    日本評論社  2007.9 

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    Language:Japanese

  7. 宇宙はどこまで明らかになったのか

    福江純、粟野論美、吉川真、小久保英一郎、谷口義明、杉山直、他6名( Role: Joint author)

    SoftBank Creative  2007.6 

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    Language:Japanese

  8. アインシュタインと21世紀の物理学

    田崎晴明、杉山直、他8名( Role: Joint author)

    日本評論社  2005.3 

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  9. 宇宙の進化

    蜂巣泉、杉山直他( Role: Joint author)

    放送大学教育振興会  2004.3 

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    Language:Japanese

  10. *宇宙 その始まりから終わりへ

    杉山 直( Role: Sole author)

    朝日新聞社  2003.6 

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    宇宙はどんなふうに始まったのだろう?私たち人類はそれをずっと考え続けてきた。多くの民族の神話に、天地創造の物語がある。やがて人類は科学の力を得て、次々と宇宙を解明していく。「宇宙で遠くを見る」ということは、その昔の姿を見ることに他ならない。巨大な望遠鏡や人工衛星など、最新の観測技術を用いて星空を見上げれば、宇宙の遙かな過去が見えてくる。どう始まったのかがわかれば、いつどのように終わるのかも自ずとわかってくる。現在、人類は宇宙のことをどこまでわかっているのか?宇宙はこれからどうなっていくのだろう?いつか終わりを迎えるのか?宇宙に魅せられ、その過去と未来を旅する人々の物語。

  11. Physics of Expanding Universe and Big Bang

    Naoshi Sugiyama( Role: Sole author)

    Iwanami Publisher  2001.11 

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Presentations 11

  1. Acoustic Oscillations in Temperature Fluctuations of Cosmic Microwave Background Radiation International conference

    Naoshi Sugiyama

    Development of Observational Cosmology: Cosmic Microwave Background and X-ray Astronomy  

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    Event date: 2011.11

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

    Country:Japan  

  2. Contents of the Universe International conference

    Naoshi Sugiyama

    Fundamental Physics using Atoms 

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    Event date: 2011.10

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

    Country:Japan  

  3. ビッグバン宇宙論

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    Event date: 2010.12

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

    Country:Japan  

  4. CMB偏光で探る宇宙構造と宇宙暗黒時代

    日本物理学会 宇宙線・宇宙物理領域,素粒子論領域合同シンポジウム 「主題:宇宙背景放射の偏光からさぐる初期宇宙と超高エネルギー物理」 

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    Event date: 2010.3

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

    Country:Japan  

  5. ALMA and Cosmology International conference

    ALMA User's Meeting 2009 

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    Event date: 2009.12

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

    Country:Japan  

  6. Cosmic Microwave Background: A New & Ultimate Tool for Cosmology and Particle Physics International conference

    Extended Workshop on DM, LHC and Cosmology 

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    Event date: 2009.8

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

  7. Cosmological Magnetic Fields International conference

    ASPEN Winter Meeting on Cosmic Microwave Background 

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    Event date: 2008.1

    Language:English   Presentation type:Oral presentation (general)  

  8. Patchy Reionization International conference

    PLANCK satellite Working Group 5 meeting 

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    Event date: 2007.12

    Language:English   Presentation type:Oral presentation (general)  

  9. Anisotoropies of Cosmic Microwave Background and Its Polarization International conference

    International Conference on Topics in Astroparticle and Underground Physics (TAUP) 2007 

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    Event date: 2007.9

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

    Country:Japan  

  10. ALMA and Sunyaev-Zeld'vich Effect International conference

    ALMA Science Workshop 

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    Event date: 2006.11

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

  11. Cosmic Magnetic Fields International conference

    COSPA Meeting 

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    Event date: 2006.11

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

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KAKENHI (Grants-in-Aid for Scientific Research) 9

  1. MWAで探る宇宙最初期星形成と宇宙再電離

    Grant number:21H04467  2021.4 - 2026.3

    杉山 直

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    Authorship:Principal investigator 

    Grant amount:\41860000 ( Direct Cost: \32200000 、 Indirect Cost:\9660000 )

  2. 長波長電波観測による宇宙再電離と磁場研究の新展開

    2017.4

    科学研究費補助金  基盤研究(A)

    杉山 直

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    Authorship:Principal investigator 

  3. 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:Principal investigator 

    Grant amount:\44070000 ( Direct Cost: \33900000 、 Indirect Cost:\10170000 )

  4. Why does the Universe accelerate? - Exhaustive study and challenge for the future -

    Grant number:15K21733  2015.11 - 2020.3

    Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    MURAYAMA HITOSHI

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    Authorship:Coinvestigator(s) 

    The purpose of this innovative research area is to reveal the physics driving accelerating expansion of the universe that should have occurred at the beginning and is now happening today. With the aid of support from this grant supporting international collaboration, we made the following, main achievements. We were able to efficiently and surely make progress in international collaborations, especially instrumentation, experiment and observational projects under this research program. Junior researchers of our group managed to establish an international collaboration between totally independent projects, the CMB experiment POLARBEAR and the Subaru Hyper Suprime-Cam (HSC) project. The international team made a detection of the gravitational lensing due to cosmic structures from the two independent datasets, for the first time (Chinone et al. 2019). The Subaru HSC international collaboration made accurate measurements of cosmological parameters.

  5. ダークエネルギーの理論モデル構築とその観測的検証

    2015.6 - 2020.3

    科学研究費補助金  新学術領域研究(研究領域提案型)

    杉山直

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    Authorship:Principal investigator 

  6. 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

    新学術領域研究(研究領域提案型)

    杉山 直

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    Authorship:Principal investigator 

    Grant amount:\45370000 ( Direct Cost: \34900000 、 Indirect Cost:\10470000 )

    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。

  7. 宇宙磁場の生成と構造形成に及ぼす影響

    2013.4 - 2017.3

    科学研究費補助金  基盤研究(B)

    杉山 直

  8. 銀河分布を用いたダークエネルギーの研究

    2006.4 - 2012.3

    科学研究費補助金  特定領域研究

    杉山 直

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    Authorship:Principal investigator 

  9. 初期天体形成と背景放射

    2005.4 - 2009.3

    科学研究費補助金  基盤研究(C)

    杉山 直

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    Authorship:Principal investigator 

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Teaching Experience (On-campus) 1

  1. First Year Seminar A

    2011

 

Social Contribution 1

  1. 愛知県立半田高等学校SSH運営指導員

    Role(s):Organizing member

    2013.4

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    Audience: High school students

    Type:Research consultation