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Pulsation-driven mass loss from massive stars behind stellar mergers in metal-poor dense clusters
Daisuke Nakauchi, Kohei Inayoshi, Kazuyuki Omukai
The recent discovery of high-redshift (z > 6) supermassive black holes (SMBH) favors the formation of massive seed BHs in protogalaxies. One possible scenario is formation of massi…
Formation of Primordial Supermassive Stars by Rapid Mass Accretion
Takashi Hosokawa, Harold W. Yorke, Kohei Inayoshi +2
Supermassive stars (SMSs) forming via very rapid mass accretion (Mdot >~ 0.1 Msun/yr) could be precursors of supermassive black holes observed beyond redshift of about 6. Extending…
Direct diagnostics of forming massive stars: stellar pulsation and periodic variability of maser sources
Kohei Inayoshi, Koichiro Sugiyama, Takashi Hosokawa +2
The 6.7 GHz methanol maser emission, a tracer of forming massive stars, sometimes shows enigmatic periodic flux variations over several 10-100 days. In this Letter, we propose that…
Pulsational instability of supergiant protostars: Do they grow supermassive by accretion?
Kohei Inayoshi, Takashi Hosokawa, Kazuyuki Omukai
Supermassive stars (SMSs; M>10^5 Msun) and their remnant black holes are promising progenitors for supermassive black holes (SMBHs) observed in the early universe at z>7. It has be…