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Modeling the dynamical friction timescale of a sinking satellite
Gan, Jian-Ling1,3; Kang, Xi2; Hou, Jin-Liang1; Chang, Rui-Xiang1
2010-12-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume10Issue:12Pages:1242-1254
AbstractWhen a satellite galaxy falls into a massive dark matter halo it suffers from the dynamical friction force which drags it into the halo's center, where it finally merges with the central galaxy The time interval between entry and merger is called the dynamical friction timescale (T-df) Many studies have been dedicated to deriving T-df using analytical models or N-body simulations These studies have obtained qualitative agreements on how T-df depends on the orbital parameters, and the mass ratio between the satellite and the host's halo However, there are still disagreements on deriving an accurate form for T-df We present a semi-analytical model to predict T-df and we focus on interpreting the discrepancies among different studies We find that the treatment of mass loss from the satellite by tidal stripping dominates the behavior of T-df We also identify other model parameters which affect the predicted T-df
KeywordMethods Analytical Methods Numerical Galaxies Haloes Galaxies Evolution Galaxies Interactions Cosmology Dark Matter
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordDARK-MATTER SUBSTRUCTURE ; GALAXY FORMATION ; DENSITY PROFILES ; INNER STRUCTURE ; POWER SPECTRUM ; GALACTIC DISCS ; DWARF GALAXIES ; MASS-LOSS ; HALOES ; EVOLUTION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000285676800005
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15948
Collection南极天文中心
Affiliation1.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Gan, Jian-Ling,Kang, Xi,Hou, Jin-Liang,et al. Modeling the dynamical friction timescale of a sinking satellite[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2010,10(12):1242-1254.
APA Gan, Jian-Ling,Kang, Xi,Hou, Jin-Liang,&Chang, Rui-Xiang.(2010).Modeling the dynamical friction timescale of a sinking satellite.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,10(12),1242-1254.
MLA Gan, Jian-Ling,et al."Modeling the dynamical friction timescale of a sinking satellite".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 10.12(2010):1242-1254.
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