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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
M. Bierschenk, C. Ricci, M. J. Temple, S. Satyapal, J. Cann, Y. Xie, Y. Diaz, K. Ichikawa, M. J. Koss, F. E. Bauer, et al. BASS. XLI. The Correlation between Mid-infrared Emission Lines and Active Galactic Nuclei Emission. Astrophysical Journal. 2024. 976. 2
Kohei Inayoshi, Kohei Ichikawa. Birth of Rapidly Spinning, Overmassive Black Holes in the Early Universe. Astrophysical Journal Letters. 2024. 973. 2
Kianhong Lee, Masayuki Akiyama, Kotaro Kohno, Daisuke Iono, Masatoshi Imanishi, Bunyo Hatsukade, Hideki Umehata, Tohru Nagao, Yoshiki Toba, Xiaoyang Chen, et al. Ongoing and Fossil Large-scale Outflows Detected in a High-redshift Radio Galaxy: [C ii] Observations of TN J0924-2201 at z = 5.174. Astrophysical Journal. 2024. 972. 1
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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
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)
2021/06 - Tohoku University Prominent research fellow
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Association Membership(s) (4):
International Astronomical Union (IAU)
, American Astronomical Society
, SPinACH (SPecialists in Astronomy, Classics, and History)
, THE ASTRONOMICAL SOCIETY OF JAPAN