中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
NIHAO XIX: how supernova feedback shapes the galaxy baryon cycle

文献类型:期刊论文

作者Tollet, Edouard1,2,3; Cattaneo, Andrea1,2; Maccio, Andrea V.4,5; Dutton, Aaron A.4; Kang, Xi6
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2019-05-01
卷号485期号:2页码:2511-2531
ISSN号0035-8711
关键词supernovae: general ISM: jets and outflows galaxies: evolution galaxies: formation
DOI10.1093/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
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
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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.

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来源:紫金山天文台

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