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题名: NIHAO project - I. Reproducing the inefficiency of galaxy formation across cosmic time with a large sample of cosmological hydrodynamical simulations
作者: Wang, Liang1, 2, 3; Dutton, Aaron A.2; Stinson, Gregory S.2; Maccio, Andrea V.2; Penzo, Camilla1; Kang Xi(康熙)1; Keller, Ben W.4; Wadsley, James4
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2015-11-21
卷号: 454, 期号:1, 页码:83-94
关键词: methods: numerical ; galaxies: dwarf ; galaxies: evolution ; galaxies: formation ; galaxies: spiral ; cosmology: theory
DOI: 10.1093/mnras/stv1937
文章类型: Article
英文摘要: We introduce project NIHAO (Numerical Investigation of a Hundred Astrophysical Objects), a set of 100 cosmological zoom-in hydrodynamical simulations performed using the GASOLINE code, with an improved implementation of the SPH algorithm. The haloes in our study range from dwarf (M-200 similar to 5 x 10(9) M-circle dot) to Milky Way (M-200 similar to 2 x 10(12) M-circle dot) masses, and represent an unbiased sampling of merger histories, concentrations and spin parameters. The particle masses and force softenings are chosen to resolve the mass profile to below 1 per cent of the virial radius at all masses, ensuring that galaxy half-light radii are well resolved. Using the same treatment of star formation and stellar feedback for every object, the simulated galaxies reproduce the observed inefficiency of galaxy formation across cosmic time as expressed through the stellar mass versus halo mass relation, and the star formation rate versus stellar mass relation. We thus conclude that stellar feedback is the chief piece of physics required to limit the efficiency of star formation in galaxies less massive than the Milky Way.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: INITIAL MASS FUNCTION ; STAR-FORMATION RATES ; DARK-MATTER HALOES ; SMOOTHED-PARTICLE HYDRODYNAMICS ; STELLAR MASS ; LUMINOSITY FUNCTION ; DISK GALAXIES ; FORMATION HISTORIES ; EAGLE SIMULATIONS ; FORMING GALAXIES
收录类别: SCI
项目资助者: Deutsche Forschungsgemeinschaft (DFG) through Collaborative Research Center(SFB 881) ; Julich Supercomputing Center (JSC) ; German Research Foundation (DFG)(Sonderforschungsbereich SFB 881) ; MPG-CAS ; NSFC(11333008) ; 'Strategic Priority Research Program the Emergence of Cosmological Structures' of the CAS(XD09010000) ; European Research Council under European Union(321035)
语种: 英语
WOS记录号: WOS:000363657000005
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16033
Appears in Collections:南极天文中心_期刊论文

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作者单位: 1.Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Max Planck Inst Astron, D-69117 Heidelberg, Germany
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada
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