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	Gravitational collapse and the thermal evolution of low-metallicity gas clouds in the early Universe
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	463(3),pp.2781-2798
著者・共著者	◎Gen Chiaki,Naoki Yoshida,Shingo Hirano
概要	We study gravitational collapse of low-metallicity gas clouds and the formation of protostars by three-dimensional hydrodynamic simulations. Grain growth, non-equilibrium chemistry, molecular cooling, and chemical heating are solved in a self-consistent manner for the first time. We employ the realistic initial conditions for the abundances of metal and dust, and the dust size distribution obtained from recent Population III supernova calculations. We also introduce the state-of-the-art particle splitting method based on the Voronoi tessellation and achieve an extremely high mass resolution of similar to 10(-5) M-circle dot (10 Earth masses) in the central region. We follow the thermal evolution of several clouds with various metallicities. We show that the condition for cloud fragmentation depends not only on the gas metallicity but also on the collapse time-scale.
DOI	10.1093/mnras/stw2120
ISSN	0035-8711/1365-2966
ORCIDのPut Code	31843109
PermalinkURL	http://orcid.org/0000-0002-4317-767X