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
市川幸平. 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
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)