研究者情報 | 神奈川大学

ヒラノ　シンゴ Hirano Shingo 平野　信吾所属神奈川大学工学部応用物理学科職種助教
言語種別	英語
発行・発表の年月	2016/12
形態種別	学術雑誌
査読	査読あり
標題	COSMOLOGICAL SIMULATIONS OF EARLY BLACK HOLE FORMATION: HALO MERGERS, TIDAL DISRUPTION, AND THE CONDITIONS FOR DIRECT COLLAPSE
執筆形態	共著
掲載誌名	ASTROPHYSICAL JOURNAL
出版社・発行元	IOP PUBLISHING LTD
巻・号・頁	832(2),pp.134-155
著者・共著者	◎Sunmyon Chon,Shingo Hirano,Takashi Hosokawa,Naoki Yoshida
概要	Gravitational collapse of a massive primordial gas cloud is thought to be a promising path for the formation of supermassive black holes in the early universe. We study conditions for the so-called direct collapse (DC) black hole formation in a fully cosmological context. We combine a semianalytic model of early galaxy formation with halo merger trees constructed from dark matter N-body simulations. We locate a total of 68 possible DC sites in a volume of 20h-1Mpcon a side. We then perform hydrodynamics simulations for 42 selected halos to study in detail the evolution of the massive clouds within them. We find only two successful cases where the gas clouds rapidly collapse to form stars. In the other cases, gravitational collapse is prevented by the tidal force exerted by a nearby massive halo, which otherwise should serve as a radiation source necessary for DC.
DOI	10.3847/0004-637X/832/2/134
ISSN	0004-637X/1538-4357
ORCIDのPut Code	31843098
PermalinkURL	http://orcid.org/0000-0002-4317-767X