Impact of filaments on galaxy formation in their residing dark matter haloes

doi:10.1093/mnras/stz441

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	Impact of filaments on galaxy formation in their residing dark matter haloes
	Liao, Shihong 1; Gao, Liang 1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-05-01
卷号	485 期号:1 页码:464-473
关键词	methods: numerical Galaxy: formation Galaxy: halo
ISSN号	0035-8711
DOI	10.1093/mnras/stz441
英文摘要	We use a high-resolution zoom-in hydrodynamical simulation to investigate the impact of filaments on galaxy formation in their residing dark matter haloes. A method based on the density field and the Hoshen-Kopelman algorithm is developed to identify filaments. We show that cold and dense gas pre-processed by dark matter filaments can be further accreted into residing individual low-mass haloes in directions along the filaments. Consequently, comparing with field haloes, gas accretion is very anisotropic for filament haloes. About 30 per cent of the accreted gas of a residing filament halo was pre-processed by filaments, leading to two different thermal histories for the gas in filament haloes. Filament haloes have higher baryon and stellar fractions when compared with their field counterparts. Without including stellar feedback, our results suggest that filaments assist gas cooling and enhance star formation in their residing dark matter haloes at high redshifts (i.e. z = 4.0 and 2.5).
资助项目	NSFC[11133003] ; NSFC[11425312] ; Newton Advanced Fellowship ; Institute for Computational Cosmology at Durham University
WOS关键词	COLD FLOWS ; STAR-FORMATION ; GAS ACCRETION ; UNIVERSE ; EVOLUTION ; CLUSTERS ; FEEDBACK ; STREAMS ; MODE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000466786400033
资助机构	NSFC ; NSFC ; Newton Advanced Fellowship ; Newton Advanced Fellowship ; Institute for Computational Cosmology at Durham University ; Institute for Computational Cosmology at Durham University ; NSFC ; NSFC ; Newton Advanced Fellowship ; Newton Advanced Fellowship ; Institute for Computational Cosmology at Durham University ; Institute for Computational Cosmology at Durham University ; NSFC ; NSFC ; Newton Advanced Fellowship ; Newton Advanced Fellowship ; Institute for Computational Cosmology at Durham University ; Institute for Computational Cosmology at Durham University ; NSFC ; NSFC ; Newton Advanced Fellowship ; Newton Advanced Fellowship ; Institute for Computational Cosmology at Durham University ; Institute for Computational Cosmology at Durham University
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/26187]
专题	中国科学院国家天文台
通讯作者	Liao, Shihong
作者单位	1.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Durham, Inst Computat Cosmol, Dept Phys, Sci Labs, South Rd, Durham DH1 3LE, England
推荐引用方式 GB/T 7714	Liao, Shihong,Gao, Liang. Impact of filaments on galaxy formation in their residing dark matter haloes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,485(1):464-473.
APA	Liao, Shihong,&Gao, Liang.(2019).Impact of filaments on galaxy formation in their residing dark matter haloes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,485(1),464-473.
MLA	Liao, Shihong,et al."Impact of filaments on galaxy formation in their residing dark matter haloes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 485.1(2019):464-473.