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	2017/08
形態種別	学術雑誌
査読	査読あり
標題	Formation and survival of Population III stellar systems
執筆形態	共著
掲載誌名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版社・発行元	OXFORD UNIV PRESS
巻・号・頁	470(1),pp.898-914
担当区分	筆頭著者,責任著者
国際共著	国際共著
著者・共著者	◎Shingo Hirano,Volker Bromm
概要	The initial mass function of the first, Population III (Pop III), stars plays a vital role in shaping galaxy formation and evolution in the early Universe. One key remaining issue is the final fate of secondary protostars formed in the accretion disc, specifically whether they merge or survive. We perform a suite of hydrodynamic simulations of the complex interplay among fragmentation, protostellar accretion and merging inside darkmatterminihaloes. Instead of the traditional sink particle method, we employ a stiff equation of state approach, so that we can more robustly ascertain the viscous transport inside the disc. The simulations show inside-out fragmentation because the gas collapses faster in the central region. Fragments migrate on the viscous time-scale, over which angular momentum is lost, enabling them to move towards the disc centre, where merging with the primary protostar can occur.
DOI	10.1093/mnras/stx1220
ISSN	0035-8711/1365-2966
ORCIDのPut Code	37237747
PermalinkURL	http://orcid.org/0000-0002-4317-767X