Research field (3)：
Particle, nuclear, cosmic-ray, and astrophysics - experiment
, Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
, Astronomy
Research keywords (8)：
High Energy Astropysics
, Optical and Infrared Astronomy
, Radio Astronomy
, Active Galactic Nucleus
, Astropyscis
, X-ray Astropysics
, evolution of galaxies
, black holes
Research theme for competitive and other funds (23)：
2023 - 2024 High-Resolution Measurements of the Black Hole Gas Ejection through Emission and Absorption Lines
2020 - 2024 Zoom-in to Black Holes in X-rays: Development of New Concept Interferometer and Polarimetric and High-resolution Spectroscopic Observations
2014 - 2017 Investigation on galaxy evolution based on an integral field spectroscopy of Ly_alpha blobs using a large telescope
2016 - 2017 ブラックホールが銀河形成史に果たした役割の補償光学面分光観測による解明
2016 - 2017 すばる望遠鏡補償光学面分光による原始活動銀河核のガス噴出流の研究
2013 - 2014 巨大ブラックホールの形成・成長と銀河形成史へ果たした役割
2010 - 2012 A study of radiation and flux variation mechanisms of active galactic nuclei using databases of multi-wavelength monitoring observations
2008 - 2010 超臨界ガス降着現象と銀河・ブラックホールの進化
2007 - 2010 Coevolution of Black Holes and Galaxies in proto-active galactic nuclei and polarized X-ray emission
2006 - 2007 原始活動銀河核におけるブラックホール・銀河の共進化と偏光X線放射
2004 - 2005 原始活動銀河核の物理とブラックホールの宇宙論的成長
1999 - 2001 活動銀河核の物理と紫外・X線背景放射への寄与
1998 - 1998 国際会議 国際天文連合シンポジウム 招待講演 渡航費補助
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Papers (118)：
Takuma Izumi, Yoshiki Matsuoka, Masafusa Onoue, Michael A. Strauss, Hideki Umehata, John D. Silverman, Tohru Nagao, Masatoshi Imanishi, Kotaro Kohno, Yoshiki Toba, et al. Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars. Astrophysical Journal. 2024. 972. 1
Shun Hatano, Masami Ouchi, Hiroya Umeda, Kimihiko Nakajima, Toshihiro Kawaguchi, Yuki Isobe, Shohei Aoyama, Kuria Watanabe, Yuichi Harikane, Haruka Kusakabe, et al. EMPRESS. XIV. Strong High-ionization Lines of Young Galaxies at z = 0-8: Ionizing Spectra Consistent with the Intermediate-mass Black Holes with M BH ∼ 103-106 M ⊙. Astrophysical Journal. 2024. 966. 2
K. Iwasawa, T. Liu, Th Boller, J. Buchner, J. Li, T. Kawaguchi, T. Nagao, Y. Terashima, Y. Toba, J. D. Silverman, et al. Steep-spectrum AGN in eROSITA Final Equatorial-Depth Survey (eFEDS): Their host galaxies and multi-wavelength properties. Astronomy and Astrophysics. 2024. 684
Yoshiki Matsuoka, Takuma Izumi, Masafusa Onoue, Michael A. Strauss, Kazushi Iwasawa, Nobunari Kashikawa, Masayuki Akiyama, Kentaro Aoki, Junya Arita, Masatoshi Imanishi, et al. Discovery of Merging Twin Quasars at z = 6.05. The Astrophysical Journal Letters. 2024
Wanqiu He, Masayuki Akiyama, Motohiro Enoki, Kohei Ichikawa, Kohei Inayoshi, Nobunari Kashikawa, Toshihiro Kawaguchi, Yoshiki Matsuoka, Tohru Nagao, Masafusa Onoue, et al. Black Hole Mass and Eddington-ratio Distributions of Less-luminous Quasars at z ∼ 4 in the Subaru Hyper Suprime-Cam Wide Field. Astrophysical Journal. 2024. 962. 2
Kawaguchi Toshihiro. 27aSA-2 Investigation of Formation Processes of Supermassive Black Holes. Meeting abstracts of the Physical Society of Japan. 2014. 69. 1. 1-1
1999/04 - 2002/03 Kyoto University Department of Astronomy, Graduate School of Science JSPS Pre-doctoral Research Fellow (DC1)
1998/04 - 1999/03 Kyoto University Department of Astronomy, Graduate School of Science Teaching Assistant
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Awards (4)：
2023/02 - 日本天文学会 欧文研究報告(PASJ 誌) 論文賞 "Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). II. Discovery of 32 Quasars and Luminous Galaxies at 5.7 < z < 6.8", PASJ, Vol.70, S35
2020/06 - Onomichi City University Excellent Faculty
2013/09 - Soryushi Shogakukai Seitaro Nakamura Award
2005/03 - Astronomical Society of Japan The PASJ Excellent Paper Award "Slim Disk Model for Soft Excess and Variability of Narrow-Line Seyfert 1 Galaxies", PASJ, Vol.52, pp.499-508
