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NIHAO XIX: how supernova feedback shapes the galaxy baryon cycle
Tollet, Edouard1,2,3; Cattaneo, Andrea1,2; Maccio, Andrea V.4,5; Dutton, Aaron A.4; Kang, Xi6
2019-05-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume485Issue:2Pages:2511-2531
Corresponding AuthorTollet, Edouard(edouard.tollet@obspm.fr)
AbstractWe 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.
Keywordsupernovae: general ISM: jets and outflows galaxies: evolution galaxies: formation
DOI10.1093/mnras/stz545
WOS KeywordCOLD DARK-MATTER ; TULLY-FISHER RELATION ; STELLAR MASS FUNCTION ; GALACTIC WINDS ; STAR-FORMATION ; X-RAY ; BLACK-HOLES ; GAS CLOUDS ; MODEL ; EVOLUTION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000474886200075
PublisherOXFORD UNIV PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/27439
Collection中国科学院紫金山天文台
Corresponding AuthorTollet, Edouard
Affiliation1.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
Recommended Citation
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.
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