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
Hisakazu Uchiyama, Yoshiki Matsuoka, Tohru Nagao, Nobunari Kashikawa, Hina Kurasawa, Jun Toshikawa, Taira Oogi, Hideki Umehata, Mariko Kubo, Yoshiki Toba, et al. A Global Correlation between Galaxy Density and Intergalactic HI Gas at z∼4 from Imaging Data. 2024
Yoshiki Toba, Aoi Hashiguchi, Naomi Ota, Masamune Oguri, Nobuhiro Okabe, Yoshihiro Ueda, Masatoshi Imanishi, Atsushi J. Nishizawa, Tomotsugu Goto, Bau-Ching Hsieh, et al. AGN properties of ~1 million member galaxies of galaxy groups and clusters at z < 1.4 based on the Subaru Hyper Suprime-Cam survey. The Astrophysical Journal. 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
Ayumi Takahashi, Yoshiki Matsuoka, Masafusa Onoue, Michael A. Strauss, Nobunari Kashikawa, Yoshiki Toba, Kazushi Iwasawa, Masatoshi Imanishi, Masayuki Akiyama, Toshihiro Kawaguchi, et al. Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XVII. Black Hole Mass Distribution at z ∼ 6 Estimated via Spectral Comparison with Low-z Quasars. Astrophysical Journal. 2024. 960. 2
Claire Greenwell, Poshak Gandhi, Daniel Stern, Peter Boorman, Yoshiki Toba, George Lansbury, Vincenzo Mainieri, Christopher Desira. A candidate Optically Quiescent Quasar lacking narrow emission lines. 2021
Kenta Setoguchi, Yoshihiro Ueda, Yoshiki Toba, Masayuki Akiyama. Black Hole and Galaxy Coevolution in Moderately Luminous Active Galactic Nuclei at z~1.4 in SXDF. ASTROPHYSICAL JOURNAL. 2021. 909. 2
