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The suppression of direct collapse black hole formation by soft X-ray irradiation
Kohei Inayoshi, Takamitsu L. Tanaka
The origin of supermassive black holes (SMBHs) in galactic nuclei is one of the major unsolved problems in astrophysics. One hypothesis is that they grew from >10^5 M_sun black hol…
Does disk fragmentation prevent the formation of supermassive stars in protogalaxies?
Kohei Inayoshi, Zoltan Haiman
Supermassive stars (SMSs; >10^5 Msun) formed in the first protogalaxies with virial temperature T_vir>10^4 K are expected to collapse into seeds of supermassive black hole (SMBHs)…
Conditions for HD Cooling in the First Galaxies Revisited: Interplay between Far-Ultraviolet and Cosmic Ray Feedback in Population III Star Formation
Daisuke Nakauchi, Kohei Inayoshi, Kazuyuki Omukai
HD dominates the cooling of primordial clouds with enhanced ionization, e.g. shock-heated clouds in structure formation or supernova remnants, relic HII regions of Pop III stars, a…
Formation of an embryonic supermassive star in the first galaxy
Kohei Inayoshi, Kazuyuki Omukai, Elizabeth J. Tasker
We studied the gravitational collapse of a warm (~8000 K) primordial-gas cloud as a candidate progenitor for a supermassive star (SMS; >10^5 Msun) using a three-dimensional hydrody…