79 citations · 161 across the 4 of their papers we have counts for
9 papers
H1821+643: The most X-ray and infrared luminous AGN in the Swift/BAT survey in the process of rapid stellar and supermassive black hole mass assembly
Hikaru Fukuchi, Kohei Ichikawa, Masayuki Akiyama +6
H1821+643 is the most X-ray luminous non-beamed AGN of erg s in the Swift/BAT ultra-hard X-ray survey and it is also a hyper-lumin…
Light, medium-weight or heavy? The nature of the first supermassive black hole seeds
F. Sassano, R. Schneider, R. Valiante +5
Observations of hyper-luminous quasars at reveal the rapid growth of supermassive black holes (SMBHs ) whose origin is still difficult to explain. Their…
Transition of the initial mass function in the metal-poor environments
Sunmyon Chon, Kazuyuki Omukai, Raffaella Schneider
We study star cluster formation in a low-metallicity environment using three dimensional hydrodynamic simulations. Starting from a turbulent cloud core, we follow the formation and…
Disk fragmentation and intermittent accretion onto supermassive stars
Ryoki Matsukoba, Eduard I. Vorobyov, Kazuyuki Sugimura +3
Supermassive stars (SMSs) with are candidate objects for the origin of supermassive black holes observed at redshift >6. They are supposed to f…
Cosmological DCBH formation sites hostile for their growth
Sunmyon Chon, Takashi Hosokawa, Kazuyuki Omukai
The direct collapse (DC) is a promising mechanism that provides massive seed black holes (BHs) with in the early universe. To study a long-term accretion gr…
Supermassive Star Formation via Super Competitive Accretion in Slightly Metal-enriched Clouds
Sunmyon Chon, Kazuyuki Omukai
Direct collapse black hole (DCBH) formation with mass is a promising scenario for the origin of high-redshift supermassive black holes. It has usually be…