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J-GLOBAL ID：201801005556454876   Update date: Apr. 14, 2025

Toba Yoshiki

トバ ヨシキ | Toba Yoshiki
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Affiliation and department：
Ritsumeikan University College of Science and Engineering Department of Physical Sciences

About Ritsumeikan University College of Science and Engineering Department of Physical Sciences


Job title： Associate professor
Research field  (1)： Astronomy
Research theme for competitive and other funds  (5)：
  • 2022 - 2026 Growth history of galaxies and supermassive black holes explored by Euclid, eROSITA, and Subaru Telescope
  • 2022 - 2026 Growth history of galaxies and supermassive black holes explored by Euclid, eROSITA, and Subaru Telescope
  • 2019 - 2025 Precision Cosmology from the HSC-SSP optical and eROSITA X-ray surveys
  • 2019 - 2023 Growth history of supermassive black holes probed by eROSITA, Subaru, and Seimei Telescope
  • 2018 - 2021 多波長広域探査で解き明かす銀河と超巨大ブラックホールの共進化の物理
Papers (113)：
  • Hiroyuki Ikeda, Takamitsu Miyaji, Taira Oogi, Yoshiki Toba, Héctor Aceves, Stefano Marchesi, Viola Allevato, Akke Viitanen, Francesca Civano. The Halo Occupation Distribution Modeling of X-Ray-selected Active Galactic Nuclei at 0.6 < <i>z</i> < 2.6 in the COSMOS Field. The Astrophysical Journal. 2025. 982. 2. 192-192
  • Mahoshi Sawamura, Takuma Izumi, Kouichiro Nakanishi, Takeshi Okuda, Michael A. Strauss, Masatoshi Imanishi, Yoshiki Matsuoka, Yoshiki Toba, Hideki Umehata, Takuya Hashimoto, et al. No Galaxy-scale [C ii] Fast Outflow in the z = 6.72 Red Quasar HSC J1205-0000. Astrophysical Journal. 2025. 980. 1
  • Xiaoyang Chen, Masayuki Akiyama, Kohei Ichikawa, Yoshiki Toba, Toshihiro Kawaguchi, Takuma Izumi, Toshiki Saito, Daisuke Iono, Masatoshi Imanishi, Kianhong Lee, et al. Implication of Galaxy-scale Negative Feedback by One of the Most Powerful Multiphase Outflows in a Hyperluminous Infrared Galaxy at Intermediate Redshift. The Astrophysical Journal. 2025. 979. 1. 32-32
  • Yuta Yamamoto, Tohru Nagao, Takuji Yamashita, Hisakazu Uchiyama, Mariko Kubo, Yoshiki Toba, Yuichi Harikane, Kohei Ichikawa, Masaru Kajisawa, Akatoki Noboriguchi, et al. A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). X. The Massive and Passive Nature of Radio Galaxies at z ∼ 4. The Astrophysical Journal. 2024. 978. 1. 102-102
  • Yoshiki Toba, Keito Masu, Naomi Ota, Zhen-Kai Gao, Masatoshi Imanishi, Anri Yanagawa, Satoshi Yamada, Itsuki Dosaka, Takumi Kakimoto, Seira Kobayashi, et al. Discovery of a hyperluminous quasar at z = 1.62 with Eddington ratio &gt;3 in the eFEDS field confirmed by KOOLS-IFU on Seimei Telescope. Publications of the Astronomical Society of Japan. 2024. 76. 6. 1173-1180
ｍore...
MISC (68)：
  • GREX-PLUS Science Team, Akio K. Inoue, Yuichi Harikane, Takashi Moriya, Hideko Nomura, Shunsuke Baba, Yuka Fujii, Naoteru Gouda, Yasuhiro Hirahara, Yui Kawashima, et al. GREX-PLUS Science Book. arXiv e-Print. 2023
  • 小麦真也, 鳥羽儀樹, 松岡良樹, 斉藤俊貴, 山下拓時. 母銀河の拡がった輝線領域からのミリ波熱制動放射観測を通したAGN-銀河相互作用の研究. 日本天文学会年会講演予稿集. 2022. 2022
  • Yu-Yen Chang, Bau-Ching Hsieh, Wei-Hao Wang, Yen-Ting Lin, Chen-Fatt Lim, Yoshiki Toba, Yuxing Zhong, Siou-Yu Chang. Identifying AGN host galaxies by Machine Learning with HSC+WISE. 2021
  • 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
ｍore...
Work history (7)：
  • 2025/04 - 現在 Ritsumeikan University College of Science and Engineering Department of Physical Sciences Associate professor
  • 2022/04 - 2025/03 National Astronomical Observatory of Japan Subaru Telescope
  • 2021/04 - 2022/03 Nara Women's University Faculty of Science Department of Mathematical and Physical Sciences
  • 2021/04 - 2022/03 Kyoto University Graduate School of Science Postdoc fellow
  • 2018/04 - 2021/03 Japan Society for the Promotion of Science JSPS fellow
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