Organization
Doctoral Education Consortium Professor
Graduate School
Graduate School of Science
Title
Professor
External link
TASHIRO Hiroyuki
Degree 1
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博士（理学） （ 2006.3 京都大学 ）
Research Areas 2
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Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
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Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research History 4
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Nagoya University Doctoral Education Consortium Professor
2025.10
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Nagoya University Doctoral Education Consortium Professor
2025.10
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Sojo University Center for Education and Innovation Professor
2025.4 - 2025.9
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Sojo University Center for Education and Innovation Associate Professor
2023.4 - 2025.3
Education 1
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Kyoto University Graduate School, Division of Natural Science
- 2006.3
Country： Japan
Papers 93
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Revisiting constraints on primordial magnetic fields from spectral distortions of cosmic microwave background Reviewed Open Access
Fumio Uchida, Kohei Kamada, Hiroyuki Tashiro
PHYSICS LETTERS B Vol. 865 2025.6
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Genki Naruse, Kenji Hasegawa, Kenji Kadota, Hiroyuki Tashiro, Kiyotomo Ichiki
Journal of Cosmology and Astroparticle Physics Vol. 2024 ( 10 ) page： 091 - 091 2024.10
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CMB lensing from early-formed dark matter halos Reviewed
Abe, K.T., Tashiro, H.
Physical Review D Vol. 109 ( 10 ) 2024
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Aryan Bansal, Kiyotomo Ichiki, Hiroyuki Tashiro, Yoshiki Matsuoka
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 523 ( 3 ) page： 3840 - 3847 2023.6
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Validating dark energy models using the polarized Sunyaev-Zel'dovich effect with large-angle CMB temperature and E-mode polarization anisotropies Reviewed Open Access
Hiroto Kondo, Kiyotomo Ichiki, Hiroyuki Tashiro, Kenji Hasegawa
PHYSICAL REVIEW D Vol. 107 ( 10 ) 2023.5
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Probing the primordial Universe with 21 cm line from cosmic dawn/epoch of reionization Reviewed Open Access
Teppei Minoda, Shohei Saga, Tomo Takahashi, Hiroyuki Tashiro, Daisuke Yamauchi, Shuichiro Yokoyama, Shintaro Yoshiura
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN Vol. 75 page： S154 - S180 2023.2
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Probing the Mass Relation between Supermassive Black Holes and Dark Matter Halos at High Redshifts by Gravitational Wave Experiments Reviewed Open Access
Furusawa, K., Tashiro, H., Yokoyama, S., Ichiki, K.
Astrophysical Journal Vol. 959 ( 2 ) 2023
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Cosmological free-free emission from dark matter halos in the Lambda CDM model Reviewed Open Access
Katsuya T. Abe, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 106 ( 6 ) 2022.9
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Constraint on the early-formed dark matter halos using the free-free emission in the Planck foreground analysis Reviewed Open Access
Katsuya T. Abe, Teppei Minoda, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 105 ( 6 ) 2022.3
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Primordial black hole dark matter in the presence of p-wave WIMP annihilation Reviewed Open Access
Kenji Kadota, Hiroyuki Tashiro
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Vol. 2022 ( 3 ) 2022.3
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Radio bounds on the mixed dark matter scenarios of primordial black holes and WIMPs Reviewed Open Access
Kadota, K., Tashiro, H.
Journal of Cosmology and Astroparticle Physics Vol. 2022 ( 8 ) 2022
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CMB and 21-cm bounds on early structure formation boosted by primordial black hole entropy fluctuations Reviewed Open Access
Hiroyuki Tashiro, Kenji Kadota
PHYSICAL REVIEW D Vol. 104 ( 6 ) 2021.9
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Population III star explosions and Planck 2018 data Reviewed Open Access
Katsuya T. Abe, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 103 ( 12 ) 2021.6
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Constraining mixed dark-matter scenarios of WIMPs and primordial black holes from CMB and 21-cm observations Reviewed Open Access
Hiroyuki Tashiro, Kenji Kadota
PHYSICAL REVIEW D Vol. 103 ( 12 ) 2021.6
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Small-scale CMB anisotropies induced by the primordial magnetic fields Reviewed Open Access
Teppei Minoda, Kiyotomo Ichiki, Hiroyuki Tashiro
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Vol. 2021 ( 3 ) 2021.3
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Probing axion dark matter with 21 cm fluctuations from minihalos Reviewed Open Access
Kenji Kadota, Toyokazu Sekiguchi, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 103 ( 2 ) 2021.1
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The Alcock Paczynski test with voids in 21 cm intensity field Reviewed Open Access
Takao Endo, Hiroyuki Tashiro, Atsushi J. Nishizawa
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 499 ( 1 ) page： 587 - 596 2020.11
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Limits on primordial magnetic fields from primordial black hole abundance Reviewed Open Access
Shohei Saga, Hiroyuki Tashiro, Shuichiro Yokoyama
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Vol. 2020 ( 5 ) 2020.5
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The 21-cm signals from ultracompact minihaloes as a probe of primordial small-scale fluctuations Reviewed Open Access
Kunihiko Furugori, Katsuya T. Abe, Toshiyuki Tanaka, Daiki Hashimoto, Hiroyuki Tashiro, Kenji Hasegawa
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 494 ( 3 ) page： 4334 - 4342 2020.5
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Resonant magnetogenesis from axions Reviewed Open Access
Teerthal Patel, Hiroyuki Tashiro, Yuko Urakawa
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS ( 1 ) 2020.1
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Secondary CMB temperature anisotropies from magnetic reheating Open Access
Shohei Saga, Atsuhisa Ota, Hiroyuki Tashiro, Shuichiro Yokoyama
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 490 ( 3 ) page： 4419 - 4427 2019.12
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Kenji Kadota, Junpei Ooba, Hiroyuki Tashiro, Kiyotomo Ichiki, Guo-Chin Liu
PHYSICAL REVIEW D Vol. 100 ( 6 ) 2019.9
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Insight into primordial magnetic fields from 21-cm line observation with EDGES experiment Open Access
Teppei Minoda, Hiroyuki Tashiro, Tomo Takahashi
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 488 ( 2 ) page： 2001 - 2005 2019.9
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Space gravitational-wave antennas DECIGO and B-DECIGO Open Access
Seiji Kawamura, Takashi Nakamura, Masaki Ando, Naoki Seto, Tomotada Akutsu, Ikkoh Funaki, Kunihito Ioka, Nobuyuki Kanda, Isao Kawano, Mitsuru Musha, Kazuhiro Nakazawa, Shuichi Sato, Takeshi Takashima, Takahiro Tanaka, Kimio Tsubono, Jun'ichi Yokoyama, Kazuhiro Agatsuma, Koh-suke Aoyanagi, Koji Arai, Akito Araya, Naoki Aritomi, Hideki Asada, Yoichi Aso, Dan Chen, Takeshi Chiba, Toshikazu Ebisuzaki, Satoshi Eguchi, Yumiko Ejiri, Motohiro Enoki, Yoshiharu Eriguchi, Masa-Katsu Fujimoto, Ryuichi Fujita, Mitsuhiro Fukushima, Toshifumi Futamase, Rina Gondo, Tomohiro Harada, Tatsuaki Hashimoto, Kazuhiro Hayama, Wataru Hikida, Yoshiaki Himemoto, Hisashi Hirabayashi, Takashi Hiramatsu, Feng-Lei Hong, Hideyuki Horisawa, Mizuhiko Hosokawa, Kiyotomo Ichiki, Takeshi Ikegami, Kaiki T. Inoue, Hideki Ishihara, Takehiko Ishikawa, Hideharu Ishizaki, Hiroyuki Ito, Yousuke Itoh, Kiwamu Izumi, Shinya Kanemura, Nobuki Kawashima, Fumiko Kawazoe, Naoko Kishimoto, Kenta Kiuchi, Shiho Kobayashi, Kazunori Kohri, Hiroyuki Koizumi, Yasufumi Kojima, Keiko Kokeyama, Wataru Kokuyama, Kei Kotake, Yoshihide Kozai, Hiroo Kunimori, Hitoshi Kuninaka, Kazuaki Kuroda, Sachiko Kuroyanagi, Kei-ichi Maeda, Hideo Matsuhara, Nobuyuki Matsumoto, Yuta Michimura, Osamu Miyakawa, Umpei Miyamoto, Shinji Miyoki, Mutsuko Y. Morimoto, Toshiyuki Morisawa, Shigenori Moriwaki, Shinji Mukohyama, Shigeo Nagano, Kouji Nakamura, Hiroyuki Nakano, Kenichi Nakao, Shinichi Nakasuka, Yoshinori Nakayama, Erina Nishida, Atsushi Nishizawa, Yoshito Niwa, Taiga Noumi, Yoshiyuki Obuchi, Naoko Ohishi, Masashi Ohkawa, Kenshi Okada, Norio Okada, Koki Okutomi, Kenichi Oohara, Norichika Sago, Motoyuki Saijo, Ryo Saito, Masaaki Sakagami, Shin-ichiro Sakai, Shihori Sakata, Misao Sasaki, Takashi Sato, Masaru Shibata, Kazunori Shibata, Ayumi Shimo-oku, Hisaaki Shinkai, Ayaka Shoda, Kentaro Somiya, Hajime Sotani, Aru Suemasa, Naoshi Sugiyama, Yudai Suwa, Rieko Suzuki, Hideyuki Tagoshi, Fuminobu Takahashi, Kakeru Takahashi, Keitaro Takahashi, Ryutaro Takahashi, Ryuichi Takahashi, Hirotaka Takahashi, Takamori Akiteru, Tadashi Takano, Nobuyuki Tanaka, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki Tashiro, Yasuo Torii, Morio Toyoshima, Shinji Tsujikawa, Akitoshi Ueda, Ken-ichi Ueda, Takafumi Ushiba, Masayoshi Utashima, Yaka Wakabayashi, Kent Yagi, Kazuhiro Yamamoto, Toshitaka Yamazaki, Chul-Moon Yoo, Shijun Yoshida, Taizoh Yoshino
INTERNATIONAL JOURNAL OF MODERN PHYSICS D Vol. 28 ( 12 ) 2019.9
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Cosmological constraints on the velocity-dependent baryon-dark matter coupling Open Access
Junpei Ooba, Hiroyuki Tashiro, Kenji Kadota
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS ( 9 ) 2019.9
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Thermal Sunyaev-Zel'dovich anisotropy due to primordial black holes Open Access
Katsuya T. Abe, Hiroyuki Tashiro, Toshiyuki Tanaka
PHYSICAL REVIEW D Vol. 99 ( 10 ) 2019.5
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Measurement of redshift-dependent cross-correlation of HSC clusters and Fermi gamma-rays Open Access
Daiki Hashimoto, Atsushi J. Nishizawa, Masato Shirasaki, Oscar Macias, Shunsaku Horiuchi, Hiroyuki Tashiro, Masamune Oguri
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 484 ( 4 ) page： 5256 - 5266 2019.4
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Probing primordial non-Gaussianity with 21 cm fluctuations from minihalos Open Access
Toyokazu Sekiguchi, Tomo Takahashi, Hiroyuki Tashiro, Shuichiro Yokoyama
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS ( 2 ) 2019.2
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Study of systematics effects on the cross power spectrum of 21 cm line and cosmic microwave background using Murchison Widefield Array data Reviewed Open Access
S. Yoshiura, K. Ichiki, B. Pindor, K. Takahashi, H. Tashiro, C. M. Trott
Monthly Notices of the Royal Astronomical Society Vol. 483 ( 2 ) page： 2697 - 2711 2019.2
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Thermal Sunyaev-Zel'dovich Effect in the IGM due to Primordial Magnetic Fields Open Access
Teppei Minoda, Kenji Hasegawa, Hiroyuki Tashiro, Kiyotomo Ichiki, Naoshi Sugiyama
GALAXIES Vol. 6 ( 4 ) 2018.12
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Limits on primordial magnetic fields from direct detection experiments of gravitational wave background Open Access
Shohei Saga, Hiroyuki Tashiro, Shuichiro Yokoyama
PHYSICAL REVIEW D Vol. 98 ( 8 ) 2018.10
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Fa Peng Huang, Kenji Kadota, Toyokazu Sekiguchi, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 97 ( 12 ) 2018.6
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Matter bispectrum beyond Horndeski theories Open Access
Shin'ichi Hirano, Tsutomu Kobayashi, Hiroyuki Tashiro, Shuichiro Yokoyama
PHYSICAL REVIEW D Vol. 97 ( 10 ) 2018.5
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Magnetic reheating Open Access
Shohei Saga, Hiroyuki Tashiro, Shuichiro Yokoyama
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 474 ( 1 ) page： L52 - L55 2018.2
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21 cm angular power spectrum from minihalos as a probe of primordial spectral runnings Open Access
Toyokazu Sekiguchi, Tomo Takahashi, Hiroyuki Tashiro, Shuichiro Yokoyama
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS ( 2 ) 2018.2
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Mean Energy Density of Photogenerated Magnetic Fields Throughout the EoR Open Access
Jean-Baptiste Durrive, Hiroyuki Tashiro, Mathieu Langer, Naoshi Sugiyama
Proceedings of the International Astronomical Union Vol. 12 ( S333 ) page： 60 - 63 2018
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Thermal Sunyaev-Zel'dovich effect in the intergalactic medium with primordial magnetic fields Open Access
Teppei Minoda, Kenji Hasegawa, Hiroyuki Tashiro, Kiyotomo Ichiki, Naoshi Sugiyama
PHYSICAL REVIEW D Vol. 96 ( 12 ) 2017.12
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Constraining modified theories of gravity with the galaxy bispectrum Open Access
Daisuke Yamauchi, Shuichiro Yokoyama, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 96 ( 12 ) 2017.12
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Mean energy density of photogenerated magnetic fields throughout the Epoch of Reionization Open Access
Jean-Baptiste Durrive, Hiroyuki Tashiro, Mathieu Langer, Naoshi Sugiyama
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 472 ( 2 ) page： 1649 - 1658 2017.12
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Constraining the contribution of galaxies and active galactic nuclei to cosmic reionization Open Access
Shintaro Yoshiura, Kenji Hasegawa, Kiyotomo Ichiki, Hiroyuki Tashiro, Hayato Shimabukuro, Keitaro Takahashi
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 471 ( 3 ) page： 3713 - 3726 2017.11
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Can HI 21-cm lines trace the missing baryons in the filamentary structures? Open Access
Toshihiro Horii, Shinsuke Asaba, Kenji Hasegawa, Hiroyuki Tashiro
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN Vol. 69 ( 4 ) 2017.8
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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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Test of the Einstein equivalence principle with spectral distortions in the cosmic microwave background Open Access
Shun Arai, Daisuke Nitta, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 94 ( 12 ) 2016.12
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Reconstruction of CMB temperature anisotropies with primordial CMB induced polarization in galaxy clusters Open Access
Guo-Chin Liu, Kiyotomo Ichiki, Hiroyuki Tashiro, Naoshi Sugiyama
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 460 ( 1 ) page： L104 - L108 2016.7
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Effect of supersonic relative motion between baryons and dark matter on collapsed objects Open Access
Shinsuke Asaba, Kiyotomo Ichiki, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 93 ( 2 ) 2016.1
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Circular polarization of the CMB: A probe of the first stars Open Access
Soma De, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 92 ( 12 ) 2015.12
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Intergalactic magnetic field spectra from diffuse gamma-rays Open Access
Wenlei Chen, Borun D. Chowdhury, Francesc Ferrer, Hiroyuki Tashiro, Tanmay Vachaspati
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 450 ( 4 ) page： 3371 - 3380 2015.7
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Consistent generation of magnetic fields in axion inflation models Open Access
Tomohiro Fujita, Ryo Namba, Yuichiro Tada, Naoyuki Takeda, Hiroyuki Tashiro
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS ( 5 ) 2015.5
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Parity-odd correlators of diffuse gamma-rays and intergalactic magnetic fields Open Access
Hiroyuki Tashiro, Tanmay Vachaspati
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 448 ( 1 ) page： 299 - 306 2015.3
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Search for CP violating signature of intergalactic magnetic helicity in the gamma-ray sky Open Access
Hiroyuki Tashiro, Wenlei Chen, Francesc Ferrer, Tanmay Vachaspati
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 445 ( 1 ) page： L41 - L45 2014.11
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CMB mu distortion from primordial gravitational waves Open Access
Atsuhisa Ota, Tomo Takahashi, Hiroyuki Tashiro, Masahide Yamaguchi
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS ( 10 ) 2014.10
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Effects of dark matter-baryon scattering on redshifted 21 cm signals Open Access
Hiroyuki Tashiro, Kenji Kadota, Joseph Silk
PHYSICAL REVIEW D Vol. 90 ( 8 ) 2014.10
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Constraining warm dark matter with 21 cm line fluctuations due to minihalos Open Access
Toyokazu Sekiguchi, Hiroyuki Tashiro
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS ( 8 ) 2014.8
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CMB spectral distortions and energy release in the early universe Open Access
Hiroyuki Tashiro
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS Vol. 2014 ( 6 ) 2014.6
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Galactic Faraday rotation effect on polarization of 21 cm lines from the epoch of reionization Open Access
Soma De, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 89 ( 12 ) 2014.6
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21 cm fluctuations from primordial magnetic fields Open Access
Maresuke Shiraishi, Hiroyuki Tashiro, Kiyotomo Ichiki
PHYSICAL REVIEW D Vol. 89 ( 10 ) 2014.5
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CMB distortion anisotropies due to the decay of primordial magnetic fields Open Access
Koichi Miyamoto, Toyokazu Sekiguchi, Hiroyuki Tashiro, Shuichiro Yokoyama
PHYSICAL REVIEW D Vol. 89 ( 6 ) 2014.3
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Cosmological signatures of tilted isocurvature perturbations: reionization and 21cm fuctuations Open Access
Toyokazu Sekiguchi, Hiroyuki Tashiro, Joseph Silk, Naoshi Sugiyama
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS ( 3 ) 2014.3
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High redshift signatures in the 21 cm forest due to cosmic string wakes Open Access
Hiroyuki Tashiro, Toyokazu Sekiguchi, Joseph Silk
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS ( 1 ) 2014.1
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21aSB-4 スペース重力波アンテナDECIGO計画(55) : DECIGO/DPFの概要(21aSB 重力波(KAGRA,DECIGO,TOBA,検出器),宇宙線・宇宙物理領域) Open Access
安東 正樹, 神田 展行, 辻川 信二, 常定 芳基, 豊嶋 守生, 鳥居 泰男, 中尾 憲一, 中澤 知洋, 中須賀 真一, 中野 寛之, 長野 重夫, 中村 康二, 井岡 邦仁, 中山 宜典, 西澤 篤志, 西田 恵里奈, 西山 和孝, 丹羽 佳人, 能見 大河, 橋本 樹明, 端山 和大, 原田 知広, 疋田 渉, 高島 健, 姫本 宣朗, 平林 久, 平松 尚志, 福嶋 美津広, 藤田 龍一, 藤本 眞克, 二間瀬 敏史, 細川 瑞彦, 堀澤 秀之, 前田 恵一, 横山 順一, 松原 英雄, 松本 伸之, 道村 唯太, 宮川 治, 宮本 雲平, 三代木 伸二, 向山 信治, 森澤 理之, 森本 睦子, 森脇 成典, 阿久津 智忠, 八木 絢外, 山川 宏, 山崎 利孝, 山元 一広, 吉田 至順, 吉野 泰造, 柳 哲文, 若林 野花, 武者 満, 上田 暁俊, 麻生 洋一, 新谷 昌人, 坂井 真一郎, 川村 静児, 青柳 巧介, 我妻 一博, 浅田 秀樹, 新井 宏二, 池上 健, 石川 毅彦, 石崎 秀晴, 石原 秀樹, 和泉 究, 市來 淨與, 瀬戸 直樹, 伊東 宏之, 伊藤 洋介, 井上 開輝, 植田 憲一, 牛場 崇文, 歌島 昌由, 江口 智士, 江尻 悠美子, 榎 基宏, 戎崎 俊一, 中村 卓史, 江里口 良治, 大石 奈緒子, 大河 正志, 大橋 正健, 大原 謙一, 大渕 喜之, 岡田 健志, 岡田 則夫, 奥富 弘基, 河島 信樹, 坪野 公夫, 川添 史子, 河野 功, 木内 建太, 岸本 直子, 國中 均, 國森 裕生, 黒田 和明, 黒柳 幸子, 小泉 宏之, 洪 鋒雷, 佐藤 修一, 郡 和範, 穀山 渉, 苔山 圭以子, 古在 由秀, 小嶌 康史, 固武 慶, 小林 史歩, 権藤 里奈, 西條 統之, 齊藤 遼, 田中 貴浩, 阪上 雅昭, 阪田 紫帆里, 佐合 紀親, 佐々木 節, 佐藤 孝, 柴田 大, 柴田 和憲, 正田 亜八香, 真貝 寿明, 末正 有, 船木 一幸, 杉山 直, 鈴木 理恵子, 諏訪 雄大, 宗宮 健太郎, 祖谷 元, 高野 忠, 高橋 走, 高橋 慶太郎, 高橋 弘毅, 高橋 史宜, 沼田 健司, 高橋 龍一, 高橋 竜太郎, 高森 昭光, 田越 秀行, 田代 寛之, 田中 伸幸, 谷口 敬介, 樽家 篤史, 千葉 剛, 陳 たん
日本物理学会講演概要集 Vol. 69 ( 0 ) page： 49 - 49 2014
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Constraints on primordial magnetic fields from CMB distortions in the axiverse Open Access
Hiroyuki Tashiro, Joseph Silk, David J. E. Marsh
PHYSICAL REVIEW D Vol. 88 ( 12 ) 2013.12
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The effect of primordial black holes on 21-cm fluctuations Open Access
Hiroyuki Tashiro, Naoshi Sugiyama
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 435 ( 4 ) page： 3001 - 3008 2013.11
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CMB distortions from damping of acoustic waves produced by cosmic strings Open Access
Hiroyuki Tashiro, Eray Sabancilar, Tanmay Vachaspati
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS ( 8 ) 2013.8
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21 cm angular spectrum of cosmic string loops Open Access
Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 87 ( 12 ) 2013.6
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Cosmological magnetic field correlators from blazar induced cascade Open Access
Hiroyuki Tashiro, Tanmay Vachaspati
PHYSICAL REVIEW D Vol. 87 ( 12 ) 2013.6
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Constraining primordial non-Gaussianity with CMB-21 cm cross-correlations? Open Access
Hiroyuki Tashiro, Shirley Ho
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 431 ( 3 ) page： 2017 - 2023 2013.5
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Background reionization history from omniscopes Open Access
Sebastien Clesse, Laura Lopez-Honorez, Christophe Ringeval, Hiroyuki Tashiro, Michel H. G. Tytgat
PHYSICAL REVIEW D Vol. 86 ( 12 ) 2012.12
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Chiral effects and cosmic magnetic fields Open Access
Hiroyuki Tashiro, Tanmay Vachaspati, Alexander Vilenkin
PHYSICAL REVIEW D Vol. 86 ( 10 ) 2012.11
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Primordial magnetic fields with X-ray and Sunyaev-Zel'divich cluster surveys Open Access
Hiroyuki Tashiro, Keitaro Takahashi, Kiyotomo Ichiki
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 424 ( 2 ) page： 927 - 932 2012.8
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Cosmological constraints from CMB distortion Open Access
James B. Dent, Damien A. Easson, Hiroyuki Tashiro
PHYSICAL REVIEW D Vol. 86 ( 2 ) 2012.7
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Constraints on superconducting cosmic strings from early reionization Open Access
Hiroyuki Tashiro, Eray Sabancilar, Tanmay Vachaspati
PHYSICAL REVIEW D Vol. 85 ( 12 ) 2012.6
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CMB distortions from superconducting cosmic strings Open Access
Hiroyuki Tashiro, Eray Sabancilar, Tanmay Vachaspati
PHYSICAL REVIEW D Vol. 85 ( 10 ) 2012.5
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Ionized bubble number count as a probe of non-Gaussianity Open Access
Hiroyuki Tashiro, Naoshi Sugiyama
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 420 ( 1 ) page： 441 - 446 2012.2
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Second order cross-correlation between kinetic Sunyaev-Zel'dovich effect and 21-cm fluctuations from the epoch of reionization Open Access
Hiroyuki Tashiro, Nabila Aghanim, Mathieu Langer, Marian Douspis, Saleem Zaroubi, Vibor Jelic
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 414 ( 4 ) page： 3424 - 3433 2011.7
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The Japanese space gravitational wave antenna: DECIGO
Seiji Kawamura, Masaki Ando, Naoki Seto, Shuichi Sato, Takashi Nakamura, Kimio Tsubono, Nobuyuki Kanda, Takahiro Tanaka, Jun'ichi Yokoyama, Ikkoh Funaki, Kenji Numata, Kunihito Ioka, Takeshi Takashima, Kazuhiro Agatsuma, Tomotada Akutsu, Koh-suke Aoyanagi, Koji Arai, Akito Araya, Hideki Asada, Yoichi Aso, Dan Chen, Takeshi Chiba, Toshikazu Ebisuzaki, Yumiko Ejiri, Motohiro Enoki, Yoshiharu Eriguchi, Masa-Katsu Fujimoto, Ryuichi Fujita, Mitsuhiro Fukushima, Toshifumi Futamase, Tomohiro Harada, Tatsuaki Hashimoto, Kazuhiro Hayama, Wataru Hikida, Yoshiaki Himemoto, Hisashi Hirabayashi, Takashi Hiramatsu, Feng-Lei Hong, Hideyuki Horisawa, Mizuhiko Hosokawa, Kiyotomo Ichiki, Takeshi Ikegami, Kaiki T. Inoue, Koji Ishidoshiro, Hideki Ishihara, Takehiko Ishikawa, Hideharu Ishizaki, Hiroyuki Ito, Yousuke Itoh, Kiwamu Izumi, Isao Kawano, Nobuki Kawashima, Fumiko Kawazoe, Naoko Kishimoto, Kenta Kiuchi, Shiho Kobayashi, Kazunori Kohri, Hiroyuki Koizumi, Yasufumi Kojima, Keiko Kokeyama, Wataru Kokuyama, Kei Kotake, Yoshihide Kozai, Hiroo Kunimori, Hitoshi Kuninaka, Kazuaki Kuroda, Sachiko Kuroyanagi, Kei-ichi Maeda, Hideo Matsuhara, Nobuyuki Matsumoto, Yuta Michimura, Osamu Miyakawa, Umpei Miyamoto, Shinji Miyoki, Mutsuko Y. Morimoto, Toshiyuki Morisawa, Shigenori Moriwaki, Shinji Mukohyama, Mitsuru Musha, Shigeo Nagano, Isao Naito, Kouji Nakamura, Hiroyuki Nakano, Kenichi Nakao, Shinichi Nakasuka, Yoshinori Nakayama, Kazuhiro Nakazawa, Erina Nishida, Kazutaka Nishiyama, Atsushi Nishizawa, Yoshito Niwa, Taiga Noumi, Yoshiyuki Obuchi, Masatake Ohashi, Naoko Ohishi, Masashi Ohkawa, Kenshi Okada, Norio Okada, Kenichi Oohara, Norichika Sago, Motoyuki Saijo, Ryo Saito, Masaaki Sakagami, Shin-ichiro Sakai, Shihori Sakata, Misao Sasaki, Takashi Sato, Masaru Shibata, Hisaaki Shinkai, Ayaka Shoda, Kentaro Somiya, Hajime Sotani, Naoshi Sugiyama, Yudai Suwa, Rieko Suzuki, Hideyuki Tagoshi, Fuminobu Takahashi, Kakeru Takahashi, Keitaro Takahashi, Ryutaro Takahashi, Ryuichi Takahashi, Tadayuki Takahashi, Hirotaka Takahashi, Takamori Akiteru, Tadashi Takano, Nobuyuki Tanaka, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki Tashiro, Yasuo Torii, Morio Toyoshima, Shinji Tsujikawa, Yoshiki Tsunesada, Akitoshi Ueda, Ken-ichi Ueda, Masayoshi Utashima, Yaka Wakabayashi, Kent Yagi, Hiroshi Yamakawa, Kazuhiro Yamamoto, Toshitaka Yamazaki, Chul-Moon Yoo, Shijun Yoshida, Taizoh Yoshino, Ke-Xun Sun
CLASSICAL AND QUANTUM GRAVITY Vol. 28 ( 9 ) 2011.5
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Sunyaev-Zel'dovich power spectrum produced by primordial magnetic fields Open Access
Hiroyuki Tashiro, Naoshi Sugiyama
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 411 ( 2 ) page： 1284 - 1292 2011.2
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DECIGO and DECIGO pathfinder Open Access
Masaki Ando, Seiji Kawamura, Naoki Seto, Shuichi Sato, Takashi Nakamura, Kimio Tsubono, Takeshi Takashima, Ikkoh Funaki, Kenji Numata, Nobuyuki Kanda, Takahiro Tanaka, Kunihito Ioka, Kazuhiro Agatsuma, Koh-suke Aoyanagi, Koji Arai, Akito Araya, Hideki Asada, Yoichi Aso, Takeshi Chiba, Toshikazu Ebisuzaki, Yumiko Ejiri, Motohiro Enoki, Yoshiharu Eriguchi, Masa-Katsu Fujimoto, Ryuichi Fujita, Mitsuhiro Fukushima, Toshifumi Futamase, Tomohiro Harada, Tatsuaki Hashimoto, Kazuhiro Hayama, Wataru Hikida, Yoshiaki Himemoto, Hisashi Hirabayashi, Takashi Hiramatsu, Feng-Lei Hong, Hideyuki Horisawa, Mizuhiko Hosokawa, Kiyotomo Ichiki, Takeshi Ikegami, Kaiki T. Inoue, Koji Ishidoshiro, Hideki Ishihara, Takehiko Ishikawa, Hideharu Ishizaki, Hiroyuki Ito, Yousuke Itoh, Kiwamu Izumi, Isao Kawano, Nobuki Kawashima, Fumiko Kawazoe, Naoko Kishimoto, Kenta Kiuchi, Shiho Kobayashi, Kazunori Kohri, Hiroyuki Koizumi, Yasufumi Kojima, Keiko Kokeyama, Wataru Kokuyama, Kei Kotake, Yoshihide Kozai, Hiroo Kunimori, Hitoshi Kuninaka, Kazuaki Kuroda, Kei-ichi Maeda, Hideo Matsuhara, Yasushi Mino, Osamu Miyakawa, Umpei Miyamoto, Shinji Miyoki, Mutsuko Y. Morimoto, Toshiyuki Morisawa, Shigenori Moriwaki, Shinji Mukohyama, Mitsuru Musha, Shigeo Nagano, Isao Naito, Kouji Nakamura, Masahiro Nakamura, Hiroyuki Nakano, Kenichi Nakao, Shinichi Nakasuka, Yoshinori Nakayama, Kazuhiro Nakazawa, Erina Nishida, Kazutaka Nishiyama, Atsushi Nishizawa, Yoshito Niwa, Taiga Noumi, Yoshiyuki Obuchi, Masatake Ohashi, Naoko Ohishi, Masashi Ohkawa, Kenshi Okada, Norio Okada, Kenichi Oohara, Norichika Sago, Motoyuki Saijo, Ryo Saito, Masaaki Sakagami, Shin-ichiro Sakai, Shihori Sakata, Misao Sasaki, Takashi Sato, Masaru Shibata, Hisaaki Shinkai, Kentaro Somiya, Hajime Sotani, Naoshi Sugiyama, Yudai Suwa, Rieko Suzuki, Hideyuki Tagoshi, Fuminobu Takahashi, Kakeru Takahashi, Keitaro Takahashi, Ryutaro Takahashi, Ryuichi Takahashi, Tadayuki Takahashi, Hirotaka Takahashi, Takamori Akiteru, Tadashi Takano, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki Tashiro, Yasuo Torii, Morio Toyoshima, Shinji Tsujikawa, Yoshiki Tsunesada, Akitoshi Ueda, Ken-ichi Ueda, Masayoshi Utashima, Yaka Wakabayashi, Kent Yagi, Hiroshi Yamakawa, Kazuhiro Yamamoto, Toshitaka Yamazaki, Jun'ichi Yokoyama, Chul-Moon Yoo, Shijun Yoshida, Taizoh Yoshino, Ken-Xun Sun
CLASSICAL AND QUANTUM GRAVITY Vol. 27 ( 8 ) 2010.4
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A cross-correlation study between the cosmological 21 cm signal and the kinetic Sunyaev-Zel'dovich effect Open Access
Vibor Jelic, Saleem Zaroubi, Nabila Aghanim, Marian Douspis, Leon V. E. Koopmans, Mathieu Langer, Garrelt Mellema, Hiroyuki Tashiro, Rajat M. Thomas
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 402 ( 4 ) page： 2279 - 2290 2010.3
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Detectability of the 21-cm CMB cross-correlation from the epoch of reionization Open Access
Hiroyuki Tashiro, Nabila Aghanim, Mathieu Langer, Marian Douspis, Saleem Zaroubi, Vibor Jelic
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 402 ( 4 ) page： 2617 - 2625 2010.3
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Evolution of linear cosmological perturbations and its observational implications in Galileon-type modified gravity Open Access
Tsutomu Kobayashi, Hiroyuki Tashiro, Daichi Suzuki
PHYSICAL REVIEW D Vol. 81 ( 6 ) 2010.3
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Numerical study of primordial magnetic field amplification by inflation-produced gravitational waves Open Access
Sachiko Kuroyanagi, Hiroyuki Tashiro, Naoshi Sugiyama
PHYSICAL REVIEW D Vol. 81 ( 2 ) 2010.1
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Cluster formation and the Sunyaev-Zel'dovich power spectrum in modified gravity: the case of a phenomenologically extended DGP model Open Access
Tsutomu Kobayashi, Hiroyuki Tashiro
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 398 ( 1 ) page： 477 - 484 2009.9
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DECIGO pathfinder Open Access
Masaki Ando, Seiji Kawamura, Shuichi Sato, Takashi Nakamura, Kimio Tsubono, Akito Araya, Ikkoh Funaki, Kunihito Ioka, Nobuyuki Kanda, Shigenori Moriwaki, Mitsuru Musha, Kazuhiro Nakazawa, Kenji Numata, Shin-ichiro Sakai, Naoki Seto, Takeshi Takashima, Takahiro Tanaka, Kazuhiro Agatsuma, Koh-suke Aoyanagi, Koji Arai, Hideki Asada, Yoichi Aso, Takeshi Chiba, Toshikazu Ebisuzaki, Yumiko Ejiri, Motohiro Enoki, Yoshiharu Eriguchi, Masa-Katsu Fujimoto, Ryuichi Fujita, Mitsuhiro Fukushima, Toshifumi Futamase, Katsuhiko Ganzu, Tomohiro Harada, Tatsuaki Hashimoto, Kazuhiro Hayama, Wataru Hikida, Yoshiaki Himemoto, Hisashi Hirabayashi, Takashi Hiramatsu, Feng-Lei Hong, Hideyuki Horisawa, Mizuhiko Hosokawa, Kiyotomo Ichiki, Takeshi Ikegami, Kaiki T. Inoue, Koji Ishidoshiro, Hideki Ishihara, Takehiko Ishikawa, Hideharu Ishizaki, Hiroyuki Ito, Yousuke Itoh, Nobuki Kawashima, Fumiko Kawazoe, Naoko Kishimoto, Kenta Kiuchi, Shiho Kobayashi, Kazunori Kohri, Hiroyuki Koizumi, Yasufumi Kojima, Keiko Kokeyama, Wataru Kokuyama, Kei Kotake, Yoshihide Kozai, Hideaki Kudoh, Hiroo Kunimori, Hitoshi Kuninaka, Kazuaki Kuroda, Kei-ichi Maeda, Hideo Matsuhara, Yasushi Mino, Osamu Miyakawa, Shinji Miyoki, Mutsuko Y. Morimoto, Tomoko Morioka, Toshiyuki Morisawa, Shinji Mukohyama, Shigeo Nagano, Isao Naito, Kouji Nakamura, Hiroyuki Nakano, Kenichi Nakao, Shinichi Nakasuka, Yoshinori Nakayama, Erina Nishida, Kazutaka Nishiyama, Atsushi Nishizawa, Yoshito Niwa, Taiga Noumi, Yoshiyuki Obuchi, Masatake Ohashi, Naoko Ohishi, Masashi Ohkawa, Norio Okada, Kouji Onozato, Kenichi Oohara, Norichika Sago, Motoyuki Saijo, Masaaki Sakagami, Shihori Sakata, Misao Sasaki, Takashi Sato, Masaru Shibata, Hisaaki Shinkai, Kentaro Somiya, Hajime Sotani, Naoshi Sugiyama, Yudai Suwa, Rieko Suzuki, Hideyuki Tagoshi, Fuminobu Takahashi, Kakeru Takahashi, Keitaro Takahashi, Ryutaro Takahashi, Ryuichi Takahashi, Tadayuki Takahashi, Hirotaka Takahashi, Takamori Akiteru, Tadashi Takano, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki Tashiro, Yasuo Torii, Morio Toyoshima, Shinji Tsujikawa, Yoshiki Tsunesada, Akitoshi Ueda, Ken-ichi Ueda, Masayoshi Utashima, Yaka Wakabayashi, Hiroshi Yamakawa, Kazuhiro Yamamoto, Toshitaka Yamazaki, Jun'ichi Yokoyama, Chul-Moon Yoo, Shijun Yoshida, Taizoh Yoshino
CLASSICAL AND QUANTUM GRAVITY Vol. 26 ( 9 ) 2009.5
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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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The cross-correlation of the CMB polarization and the 21-cm line fluctuations from cosmic reionization Open Access
Hiroyuki Tashiro, Nabila Aghanim, Mathieu Langer, Marian Douspis, Saleem Zaroubi
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 389 ( 1 ) page： 469 - 477 2008.9
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Constraints on primordial black holes by distortions of the cosmic microwave background Open Access
Hiroyuki Tashiro, Naoshi Sugiyama
PHYSICAL REVIEW D Vol. 78 ( 2 ) 2008.7
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Secondary B-mode polarization from Faraday rotation in clusters and galaxies Open Access
Hiroyuki Tashiro, Nabila Aghanim, Mathieu Langer
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 384 ( 2 ) page： 733 - 746 2008.2
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Probing primordial magnetic fields with the 21-cm fluctuations Open Access
Hiroyuki Tashiro, Naoshi Sugiyama
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 372 ( 3 ) page： 1060 - 1068 2006.11
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Publisher's Note: Nonlinear evolution of cosmic magnetic fields and cosmic microwave background anisotropies (vol 73, pg 023002 2006) Open Access
Hiroyuki Tashiro, Naoshi Sugiyama, Robi Banerjee
PHYSICAL REVIEW D Vol. 73 ( 12 ) 2006.6
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The Japanese space gravitational wave antenna - DECIGO
Seiji Kawamura, Takashi Nakamura, Masaki Ando, Naoki Seto, Kimio Tsubono, Kenji Numata, Ryuichi Takahashi, Shigeo Nagano, Takehiko Ishikawa, Mitsuru Musha, Ken-ichi Ueda, Takashi Sato, Mizuhiko Hosokawa, Kazuhiro Agatsuma, Tomotada Akutsu, Koh-suke Aoyanagi, Koji Arai, Akito Araya, Hideki Asada, Yoichi Aso, Takeshi Chiba, Toshikazu Ebisuzaki, Yoshiharu Eriguchi, Masa-Katsu Fujimoto, Mitsuhiro Fukushima, Toshifumi Futamase, Katsuhiko Ganzu, Tomohiro Harada, Tatsuaki Hashimoto, Kazuhiro Hayama, Wataru Hikida, Yoshiaki Himemoto, Hisashi Hirabayashi, Takashi Hiramatsu, Kiyotomo Ichiki, Takeshi Ikegami, Kaiki T. Inoue, Kunihito Ioka, Koji Ishidoshiro, Yousuke Itoh, Shogo Kamagasako, Nobuyuki Kanda, Nobuki Kawashima, Hiroyuki Kirihara, Kenta Kiuchi, Shiho Kobayashi, Kazunori Kohri, Yasufumi Kojima, Keiko Kokeyama, Yoshihide Kozai, Hideaki Kudoh, Hiroo Kunimori, Kazuaki Kuroda, Kei-ichi Maeda, Hideo Matsuhara, Yasushi Mino, Osamu Miyakawa, Shinji Miyoki, Hiromi Mizusawa, Toshiyuki Morisawa, Shinji Mukohyama, Isao Naito, Noriyasu Nakagawa, Kouji Nakamura, Hiroyuki Nakano, Atsushi Nishizawa, Yoshito Niwa, Choetsu Nozawa, Masatake Ohashi, Naoko Ohishi, Masashi Ohkawa, Akira Okutomi, Kenichi Oohara, Norichika Sago, Motoyuki Saijo, Masaaki Sakagami, Shihori Sakata, Misao Sasaki, Shuichi Sato, Masaru Shibata, Hisaaki Shinkai, Kentaro Somiya, Hajime Sotani, Naoshi Sugiyama, Hideyuki Tagoshi, Tadayuki Takahashi, Hirotaka Takahashi, Ryutaro Takahashi, Tadashi Takano, Takahiro Tanaka, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki Tashiro, Masao Tokunari, Shinji Tsujikawa, Yoshiki Tsunesada, Kazuhiro Yamamoto, Toshitaka Yamazaki, Jun'ichi Yokoyama, Chul-Moon Yoo, Shijun Yoshida, Taizoh Yoshino
CLASSICAL AND QUANTUM GRAVITY Vol. 23 ( 8 ) page： S125 - S131 2006.4
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Nonlinear evolution of cosmic magnetic fields and cosmic microwave background anisotropies Open Access
Hiroyuki Tashiro, Naoshi Sugiyama, Robi Banerjee
Physical Review D - Particles, Fields, Gravitation and Cosmology Vol. 73 ( 2 ) 2006.1
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Early reionization with primordial magnetic fields Open Access
Tashiro, H., Sugiyama, N.
Monthly Notices of the Royal Astronomical Society Vol. 368 ( 2 ) 2006
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Reheating after quintessential inflation and gravitational waves Reviewed Open Access
H Tashiro, T Chiba, M Sasaki
CLASSICAL AND QUANTUM GRAVITY Vol. 21 ( 7 ) page： 1761 - 1771 2004.4
KAKENHI (Grants-in-Aid for Scientific Research) 7
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Grant number：21H05459 2021.9 - 2023.3
日本学術振興会 科学研究費助成事業 学術変革領域研究(A)
田代 寛之
Authorship：Principal investigator
Grant amount：\2340000 （ Direct Cost: \1800000 、 Indirect Cost：\540000 ）
高赤方偏移にある中性水素の超微細構造を起源とする、高赤方偏移21cm線は宇宙の新しい目として注目されている。本研究では、この高赤方偏移21cm線観測によるダークマター探索の可能性を検証する。21cm線シグナルの強度は中性水素の密度や温度に依存する。そのため、赤方偏移した21cm線のシグナル分布は、該当する赤方偏移でのバリオンガスの密度や温度の空間分布と繋がる。そこで本研究では、バリオンの温度に影響を与えるダークマターモデルに焦点をあて、そのモデルの21cm線への影響を精密に見積もる手法の確立し、将来大型電波望遠鏡計画SKAによる高赤方偏移21cm線観測を用いたモデルの検証の可能性を追求する。
本年度も引き続き、ダークマター（DM）として有力なモデルであるWeakly Interacting Massive Particle (WIMP) と原始ブラックホール (PBH)の混合モデルの宇宙論的検証の研究をおこなった。このモデルでは、DMであるPBHまわりにWIMPが高密度天体である、超コンパクトミニハロー(UCMH)が形成する。このUCMH中では、WIMPが高密度であるため、WIMPの特徴の一つである対消滅が盛んに起こることが期待される。この対消滅シグナル探査こそがこのモデルの検証となる。
そこで本研究では、この対消滅シグナル探査として天の川銀河内のシンクロトロン放射の観測を提案した。対消滅では多くの荷電粒子が生成される。そのため、銀河内のPBHまわりのUCMHより放出された荷電粒子は銀河内の磁場構造と相互作用することによりシンクロトロン放射をすることが期待できる。そこで、最新の天の川銀河の磁場構造探査の結果を用いて、この放射の強度を求めた。この結果、放射強度はPBHの存在量に強く依存しており、この強度分布の上限値よりPBHの存在量の上限値を与えることを示した。
銀河のシンクロトロン放射は電波観測により詳細に調べられている。そこで上の予言と観測量を比較することでPBHの存在量の上限を求めた。その結果、WIMP質量を100-1000GeVとすると、PBHがダークマターの総質量に占める割合は非常に限られており、わずか10^-5から10^-7程度の割合しか許されないことがわかった。このことは、CMBやガンマ線観測などとほぼ同程度の上限値であり、電波観測によってもWIMPとPBHの混合モデルは非常に厳しく制限される。
このほかにも宇宙論的シンクロトロン放射観測によるDM探査に関連する研究もおこなっている。
これらの結果はすでに2本の学術論文にまとめられてすでに公表されている。
令和4年度が最終年度であるため、記入しない。
令和4年度が最終年度であるため、記入しない。 -
Probing small-scale primordial fluctuations by the era of the next-generation radio telescope
Grant number：21K03533 2021.4 - 2025.3
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Tashiro Hiroyuki
Authorship：Principal investigator
Grant amount：\4030000 （ Direct Cost: \3100000 、 Indirect Cost：\930000 ）
The statistical properties of primordial fluctuations on sub-galactic scales remain unknown. In this study, we explore the potential of the next-generation radio telescope, the Square Kilometre Array (SKA), to probe these small-scale primordial fluctuations. We focus in particular on cosmological structure which may have formed in the early Universe through the gravitational growth of such fluctuations: primordial black holes and ultracompact minihalos. We investigate the characteristic signals originating from these objects in the SKA’s observational frequency bands, and evaluate the detectable abundance thresholds based on the expected sensitivity of the SKA. We demonstrate that SKA observation can provide stronger constraint on the abundance than the current limit, and provide further information on the statistical properties of primordial fluctuations at small scales.
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Grant number：17H01110 2017.4 - 2020.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
Sugiyama Naoshi
Authorship：Coinvestigator(s)
We have studied the Epoch of Reionization (EoR) as part of the ongoing MWA project in Australia, obtaining upper limits on the EoR neutral hydrogen 21cm signal from analysis of the auto-correlation power spectra of the MWA radio maps and cross-correlation spectra with the cosmic microwave background maps. Numerical calculations with a detailed treatment of radiation transfer are used to investigate the relationship between the initial mass function of the first stars and the 21cm line signal and show that the global signal of the 21cm line can provide information on the nature of the first stars. In addition, a theoretical model of the cross-correlation signal between galaxies and the 21cm line is developed. This method, in combination with data from future galaxy surveys, is shown to be effective in obtaining the EoR 21cm line signal while avoiding foreground radiation.
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宇宙論的観測による宇宙初期の構造形成物理の検証の研究
2015.4
科学研究費補助金 若手研究(B)
Authorship：Principal investigator
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Revealing structure formation in the early universe through cosmological observations
Grant number：15K17646 2015.4 - 2019.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
Tashiro Hiroyuki
Authorship：Principal investigator
Grant amount：\4160000 （ Direct Cost: \3200000 、 Indirect Cost：\960000 ）
We investigated the structure formation in the early universe through various cosmological observations. In particular we focused on the feasibility study of future 21 cm observations as a probe of the structure formation history.
Our main results are as follows; 21cm observations can reveal the statistical nature of the seeds of the cosmological structure over a wide range of scales, 21cm observations can access the epoch of reionization at which first stars and galaxies are produced, 21cm observations can test the theory of gravity. -
宇宙論的中性水素の21cm線で探る初代星の物理とその後の構造形成史
2014.8 - 2015.3
科学研究費補助金
Authorship：Principal investigator
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宇宙論的中性水素の21cm線で探る初代星の物理とその後の構造形成史
Grant number：26887020 2014.8 - 2015.3
日本学術振興会 科学研究費助成事業 研究活動スタート支援
田代 寛之
Authorship：Principal investigator
Grant amount：\1170000 （ Direct Cost: \900000 、 Indirect Cost：\270000 ）
本研究では、宇宙論的21cm線を用いて初代星に関連する物理をどの程度まで明らかにできるのかを理論的に評価することが目的である。
そのため本年度は、初代星物理において最も高エネルギーな現象、初代星の超新星に注目し、その爆発による宇宙論的21cm線のシグナルの理論的予言をおこなった。その結果、超新星爆発としての現象は短時間であっても、その後、超新星残骸として輝き続けるため、長時間の間（具体的には１００万年くらい）超新星残骸特有の21cm線シグナルが現れることを示した。また、超新星爆発は初代星質量によっているため、シグナルの空間的広がりが初代星の質量に関連づけれる可能性があることを示した。これらの成果は英国王立天文学会による学術誌（Monthly Notices of the Royal Astronomical Society)で発表すべく、投稿準備中である。
またこれに並行して、初代星の形成史に非常に影響をあたえる宇宙初期磁場に関する研究もおこなった。具体的には、ガンマ線観測望遠鏡Fermiの観測データを用いた宇宙論的スケールの磁場への強度制限や、初期宇宙インフレーションモデルにおける磁場生成の可能性の研究をおこなった。これらの成果は全て英語学術誌において発表された。
そのほかにも、宇宙論的21cm線を用いたダークマターの素粒子論的性質に関する研究も行い、その中では、初代星の形成にどのような影響を与えるかを議論した。