109 citations · 341 across the 7 of their papers we have counts for
11 papers
Black hole mass and Eddington ratio distributions of less-luminous quasars at in the Subaru Hyper Suprime-Cam Wide field
Wanqiu He, Masayuki Akiyama, Motohiro Enoki +11
We investigate the black hole mass function (BHMF) and Eddington ratio distribution function (ERDF) of broad-line AGNs at z=4, based on a sample of 52 quasars with i<23.2 at 3.50 <…
Quasar Luminosity Function at z = 7
Yoshiki Matsuoka, Masafusa Onoue, Kazushi Iwasawa +41
We present the quasar luminosity function (LF) at , measured with 35 spectroscopically confirmed quasars at . The sample of 22 quasars from the Subaru High-…
eROSITA Final Equatorial-Depth Survey (eFEDS): eFEDS X-ray view of WERGS Radio Galaxies selected by the Subaru/HSC and VLA/FIRST survey
Kohei Ichikawa, Takuji Yamashita, Andrea Merloni +19
We construct the eROSITA X-ray catalog of radio galaxies discovered by the WERGS survey that is made by the cross-matching of the wide-area Subaru/HSC optical survey and VLA/FIRST…
Hidden Little Monsters: Spectroscopic Identification of Low-Mass, Broad-Line AGN at with CEERS
Dale D. Kocevski, Masafusa Onoue, Kohei Inayoshi +34
We report on the discovery of two low-luminosity, broad-line AGN at identified using JWST NIRSpec spectroscopy from the CEERS Survey. We detect broad H emission from both…
Radiative feedback on supermassive star formation: the massive end of the Population III initial mass function
Daisuke Toyouchi, Kohei Inayoshi, Wenxiu Li +2
Supermassive stars (SMSs) with masses of -- are invoked as possible seeds of high-redshift supermassive black holes, but it remains under de…
Top-heavy stellar mass distribution in galactic nuclei inferred from the universally high abundance ratio of [Fe/Mg]
Daisuke Toyouchi, Kohei Inayoshi, Miho N. Ishigaki +1
Recent observations of active galactic nuclei (AGNs) have shown a high Fe~II/Mg~II line-flux ratio in their broad-line regions, nearly independent of redshift up to .…