NIHAO XIX: how supernova feedback shapes the galaxy baryon cycle

doi:10.1093/mnras/stz545

	NIHAO XIX: how supernova feedback shapes the galaxy baryon cycle
	Tollet, Edouard 1,2,3; Cattaneo, Andrea 1,2; Maccio, Andrea V.4,5; Dutton, Aaron A.4; Kang, Xi6
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-05-01
卷号	485 期号:2 页码:2511-2531
关键词	supernovae: general ISM: jets and outflows galaxies: evolution galaxies: formation
ISSN号	0035-8711
DOI	10.1093/mnras/stz545
通讯作者	Tollet, Edouard(edouard.tollet@obspm.fr)
英文摘要	We have used the NIHAO (Numerical Investigation of a Hundred Astrophysical Objects) simulations to explore how supernovae (SNe) affect star formation in galaxies. We find that SN feedback operates on all scales from the interstellar medium (ISM) to several virial radii. SNe regulate star formation by preventing condensation of HI into H-2 and by moving cold neutral gas to the hot HII phase. The first effect explains why the cold neutral gas in dwarf galaxies forms stars inefficiently. The second maintains the hot ISM of massive galaxies (HII vents out at lower masses). At v(vir) greater than or similar to 67 km s(-1), the outflow rate follows the relation: (M)over dot(out) = 23 (v(vir)/67 km s(-1))(-4.6) SFR. 20 per cent-70 per cent of the gas expelled from galaxies escapes from the halo (ejective feedback) but outflows are dominated by cold swept-up gas, most of which falls back on to the galaxy on a similar to 1Gyr time-scale. This ` fountain feedback' reduces the masses of galaxies by a factor of 2-4, since gas spends half to three quarter of its time in the fountain. Less than 10 per cent of the ejected gas mixes with the hot circumgalactic medium and this gas is usually not reaccreted. On scales as large as 6r(vir), galactic winds divert the incoming gas from cosmic filaments and prevent it from accreting on to galaxies (pre-emptive feedback). This process is the main reason for the low baryon content of ultradwarves.
WOS关键词	COLD DARK-MATTER ; TULLY-FISHER RELATION ; STELLAR MASS FUNCTION ; GALACTIC WINDS ; STAR-FORMATION ; X-RAY ; BLACK-HOLES ; GAS CLOUDS ; MODEL ; EVOLUTION
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000474886200075
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/27438]
专题	中国科学院紫金山天文台
通讯作者	Tollet, Edouard
作者单位	1.PSL Univ, GEPI, Observ Paris, 61 Ave Observ, F-75014 Paris, France 2.PSL Univ, LERMA, 61 Ave Observ, F-75014 Paris, France 3.Univ Paris Diderot, Sorbonne Paris Cite, F-75013 Paris, France 4.New York Univ Abu Dhabi, POB 129188, Abu Dhabi, U Arab Emirates 5.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany 6.Partner Grp MPI Astron, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Tollet, Edouard,Cattaneo, Andrea,Maccio, Andrea V.,et al. NIHAO XIX: how supernova feedback shapes the galaxy baryon cycle[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,485(2):2511-2531.
APA	Tollet, Edouard,Cattaneo, Andrea,Maccio, Andrea V.,Dutton, Aaron A.,&Kang, Xi.(2019).NIHAO XIX: how supernova feedback shapes the galaxy baryon cycle.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,485(2),2511-2531.
MLA	Tollet, Edouard,et al."NIHAO XIX: how supernova feedback shapes the galaxy baryon cycle".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 485.2(2019):2511-2531.