AN ANALYTICAL MODEL FOR THE ACCRETION OF DARK MATTER SUBHALOS
文献类型：期刊论文
| 作者 | Yang, Xiaohu1; Mo, H. J.2; Zhang, Youcai1,3 ; van den Bosch, Frank C.4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2011-11-01 |
| 卷号 | 741期号:1页码:13 |
| 关键词 | dark matter galaxies: formation galaxies: halos |
| 英文摘要 | An analytical model is developed for the mass function of cold dark matter subhalos at the time of accretion and for the distribution of their accretion times. Our model is based on the model of Zhao et al. for the median assembly histories of dark matter halos, combined with a simple log-normal distribution to describe the scatter in the main-branch mass at a given time for halos of the same final mass. Our model is simple, and can be used to predict the un-evolved subhalo mass function, the mass function of subhalos accreted at a given time, the accretion-time distribution of subhalos of a given initial mass, and the frequency of major mergers as a function of time. We test our model using high-resolution cosmological N-body simulations and find that our model predictions match the simulation results remarkably well. Finally, we discuss the implications of our model for the evolution of subhalos in their hosts and for the construction of a self-consistent model to link galaxies and dark matter halos at different cosmic times. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | HALO OCCUPATION DISTRIBUTION ; N-BODY SIMULATIONS ; CONDITIONAL LUMINOSITY FUNCTION ; LARGE-SCALE STRUCTURE ; LYMAN-BREAK GALAXIES ; MERGER RATES ; STELLAR MASS ; ELLIPSOIDAL COLLAPSE ; HIERARCHICAL-MODELS ; ASSEMBLY HISTORIES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000296769000013 |
| 公开日期 | 2015-01-28 |
| 源URL | [http://119.78.226.72//handle/331011/15476]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 3.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China 4.Yale Univ, Dept Astron, New Haven, CT 06520 USA |
| 推荐引用方式 GB/T 7714 | Yang, Xiaohu,Mo, H. J.,Zhang, Youcai,et al. AN ANALYTICAL MODEL FOR THE ACCRETION OF DARK MATTER SUBHALOS[J]. ASTROPHYSICAL JOURNAL,2011,741(1):13. |
| APA | Yang, Xiaohu,Mo, H. J.,Zhang, Youcai,&van den Bosch, Frank C..(2011).AN ANALYTICAL MODEL FOR THE ACCRETION OF DARK MATTER SUBHALOS.ASTROPHYSICAL JOURNAL,741(1),13. |
| MLA | Yang, Xiaohu,et al."AN ANALYTICAL MODEL FOR THE ACCRETION OF DARK MATTER SUBHALOS".ASTROPHYSICAL JOURNAL 741.1(2011):13. |
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来源：上海天文台
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