Ichikawa Kohei

イチカワコウヘイ | Ichikawa Kohei

Affiliation and department：
Job title： Associate Professor
Homepage URL (1)： https://motigomeman.wordpress.com/

Research field (1)： Astronomy

Research keywords (1)： supermassive black holes

Research theme for competitive and other funds (5)：

2020 - 2023 Rapid supermassive black hole growth revealed by multi-wavelength surveys
2018 - 2021 Revealing the close environment of supermassive black holes using the moon
2016 - 2019 新たに見つかった活動銀河核種族から暴く銀河と中心ブラックホールの共進化
2015 - 2017 赤外線とX線の両波長観測から探る新しい活動銀河核種族の解明
2012 - 2015 赤外・X線による埋もれた活動銀河の観測から探る超巨大ブラックホールと銀河の共進化

Papers (101)：

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. The Astrophysical Journal. 2024
Shogo Nishiyama, Tomohiro Kara, Brian Thorsbro, Hiromi Saida, Yohsuke Takamori, Masaaki Takahashi, Takayuki Ohgami, Kohei Ichikawa, Rainer Schödel. Origin of an orbiting star around the galactic supermassive black hole. Proceedings of the Japan Academy. Series B, Physical and biological sciences. 2024. 100. 1. 86-99
Junyao Li, John D. Silverman, Andrea Merloni, Mara Salvato, Johannes Buchner, Andy Goulding, Teng Liu, Riccardo Arcodia, Johan Comparat, Xuheng Ding, et al. The eROSITA final equatorial-depth survey (eFEDS): host-galaxy demographics of X-ray AGNs with Subaru Hyper Suprime-Cam. Monthly Notices of the Royal Astronomical Society. 2024. 527. 3. 4690-4704
C. Ricci, K. Ichikawa, M. Stalevski, T. Kawamuro, S. Yamada, Y. Ueda, R. Mushotzky, G. C. Privon, M. J. Koss, B. Trakhtenbrot, et al. BASS. XLII. The Relation between the Covering Factor of Dusty Gas and the Eddington Ratio in Nearby Active Galactic Nuclei. Astrophysical Journal. 2023. 959. 1
Taiki Kawamuro, Claudio Ricci, Richard F. Mushotzky, Masatoshi Imanishi, Franz E. Bauer, Federica Ricci, Michael J. Koss, George C. Privon, Benny Trakhtenbrot, Takuma Izumi, et al. BASS. XXXIV. A Catalog of the Nuclear Millimeter-wave Continuum Emission Properties of AGNs Constrained on Scales ≤ 100-200 pc. Astrophysical Journal, Supplement Series. 2023. 269. 1

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MISC (6)：

竹内努, 泉拓磨, 今西昌俊, 久保真理子, 播金優一, 馬場俊介, 山下拓時, 田村陽一, 梅畑豪紀, 鳥羽儀樹, et al. Importance of Dust in the Evolution of Galaxies: Prospect for SPICA. 日本天文学会年会講演予稿集. 2020. 2020
市川幸平. 最期を迎えた超巨大ブラックホールの発見〜死を迎えても輝きを失わないブラックホール〜. 東北大学理学研究科ニュース. 2019
Kohei Ichikawa. Active Galactic Nucleus caught in the act of "dying" 〜light echo delivers the information before the death〜. NEWS in Graduate School of Science at Tohoku University. 2019
市川幸平, 上田佳宏, 今西昌俊, 中川貴雄, 白旗麻衣, 金田英宏, 大薮進喜. AKARI/IRCを用いた,赤外線銀河内の埋もれた活動銀河核の探査とその赤外線光度への寄与の見積もり. 日本天文学会年会講演予稿集. 2014. 2014
市川幸平, 今西昌俊, 白旗麻衣, 中川貴雄, 上田佳宏. あかり2.5-5.0μm分光観測による赤外線銀河中の埋もれた活動銀河核の探査. 日本天文学会年会講演予稿集. 2012. 2012

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Books (2)：

ngVLA-J memo series
2021
SPICAサイエンス検討会最終報告書

Lectures and oral presentations (38)：

Radio galaxy catalog in the Subaru/HSC Joint catalog field
(Tracing the SMBH growth: outlook beyond the HSC-SSP, and future collaborations 2022)
歴史史料で探る過去の天文現象
(第9回東北大学若手アンサンブルワークショップ 2022)
Recent observational progress on AGN studies
(IGM Galaxy workshop 2022 2022)
Rapidly growing supermassive black holes in extremely radio-loud galaxies
(IAU General Assembly IAU Symposium 373: Resolving the Rise and Fall of Star Formation in Galaxies 2022)
Rapidly growing supermassive black holes in extremely radio-loud galaxies
(IAU General Assembly Focused Meeting 1: Physics of relativistic jets on all scales 2022)

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Education (2)：

2010 - 2015 Kyoto University Department of Astronomy
2006 - 2010 Kyoto University Faculty of Science

Professional career (1)：

博士 (理学) (京都大学)

Work history (8)：

2023/09 - 2026/08 Waseda University Faculty of Science and Engineering Associate professor
2023/04 - 2023/08 Tohoku University Frontier Research Institute for Interdisciplinary Sciences/Astronomical Institute Associate professor
2018/04 - 2023/03 Tohoku University Frontier research institute/Astronomical Institute Assistant Professor
2021/03 - 2022/03 Max Planck Institute for extraterrestrial Physics Visiting Researcher
2020/08 - 2020/11 Parental leave

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Committee career (5)：

2023/08 - 現在 NAOJ/Subaru telescope Subaru Telescope Time Allocation Committee
2018/04 - 現在 Thirty Meter Telescope International Science Definition Team (ISDT) core member
2018/04 - 現在 members TMT ISDT
2019/06 - 2023/05 天文月報編集委員
2012 - 2012 日本天文学会評議員

Awards (5)：

2022/11 - 東北大学若手アンサンブルワークショップ講演賞
2022/05 - 21st Intelligent Cosmos Young Researcher Award
2022/04 - 文部科学省令和4年度科学技術分野の文部科学大臣表彰若手科学者賞
2021/06 - MARCEL GROSSMANN Meeting MARCEL GROSSMANN AWARDS
2021/06 - Tohoku University Prominent research fellow

Association Membership(s) (3)：

International Astronomical Union (IAU) , American Astronomical Society , THE ASTRONOMICAL SOCIETY OF JAPAN

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