6 papers
Growth of Metal-Enriched Supermassive Stars by Accretion and Collisions
Devesh Nandal, Sunmyon Chon
Supermassive stars (SMSs) are candidate progenitors of massive black hole seeds and may contribute to anomalous abundance patterns in high-redshift galaxies and globular clusters.…
Formation of massive multiple-star systems: early migration and mergers
Sunmyon Chon, Alejandro Vigna-Gómez
Massive stars are often found in multiple systems, yet how binary-star systems with very close separations ( au) assemble remains unresolved. We investigate the formation…
Rapid emergence of overmassive black holes in the early Universe
Sunmyon Chon, Shingo Hirano, Tomoaki Ishiyama +2
The origin of supermassive black holes (SMBHs) remains a long-standing problem in astrophysics. Recent JWST observations reveal an unexpectedly abundant population of overmassive b…
Formation of supermassive stars and dense star clusters in metal-poor clouds exposed to strong FUV radiation
Sunmyon Chon, Kazuyuki Omukai
The direct collapse scenario, which predicts the formation of supermassive stars (SMSs) as precursors to supermassive black holes (SMBHs), has been explored primarily under the ass…
Sequential formation of supermassive stars and heavy seed BHs through the interplay of cosmological cold accretion and stellar radiative feedback
Masaki Kiyuna, Takashi Hosokawa, Sunmyon Chon
Supermassive stars (SMSs) and heavy seed black holes, as their remnants, are promising candidates for Supermassive Black Hole (SMBH) progenitors, especially for ones observed in th…
Gravitational collapse at low to moderate Mach numbers: The relationship between star formation efficiency and the fraction of mass in the massive object
Jorge Saavedra-Bastidas, Dominik R. G. Schleicher, Ralf S. Klessen +7
The formation of massive objects via gravitational collapse is relevant both for explaining the origin of the first supermassive black holes and in the context of massive star form…