Linking haloes to galaxies: how many halo properties are needed?
文献类型：期刊论文
| 作者 | Neistein, Eyal1,2; Weinmann, Simone M.1,3; Li, Cheng1,4; Boylan-Kolchin, Michael1,5 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2011-06-01 |
| 卷号 | 414期号:2页码:1405-1417 |
| 关键词 | galaxies: abundances galaxies: evolution galaxies: formation galaxies: haloes galaxies: statistics large-scale structure of Universe |
| 英文摘要 | Recent studies emphasize that an empirical relation between the stellar mass of galaxies and the mass of their host dark matter subhaloes can predict the clustering of galaxies and its evolution with cosmic time. In this paper we study the various assumptions made by this methodology using a semi-analytical model (SAM). To this end, we randomly swap between the locations of model galaxies within a narrow range of subhalo mass (M-infall). We find that shuffled samples of galaxies have different auto-correlation functions in comparison with the original model galaxies. This difference is significant even if central and satellite galaxies are allowed to follow a different relation between M-infall and stellar mass, and can reach a factor of similar to 2 for massive galaxies at redshift zero. We analyse three features within SAMs that contribute to this effect. (a) The relation between stellar mass and subhalo mass evolves with redshift for central galaxies, affecting satellite galaxies at the time of infall. (b) In addition, the stellar mass of galaxies falling into groups and clusters at high redshift is different from the mass of central galaxies at the same time. (c) The stellar mass growth for satellite galaxies after infall can be significant and depends on the infall redshift and the group mass. All of the above ingredients modify the stellar mass of satellite galaxies in a way that is more complicated than a dependence on the subhalo mass only. By using two different SAMs, we show that the above is true for differing models of galaxy evolution, and that the effect is sensitive to the treatment of dynamical friction and stripping of gas in satellite galaxies. We find that by using the FOF group mass at redshift zero in addition to M-infall, an empirical model is able to accurately reproduce the clustering properties of galaxies. On the other hand, using the infall redshift as a second parameter does not yield as good results because it is less correlated with stellar mass. Our analysis indicates that environmental processes that affect galaxy evolution are important for properly modelling the clustering and abundance of galaxies. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STELLAR MASS FUNCTION ; LARGE-SCALE STRUCTURE ; DIGITAL SKY SURVEY ; DARK-MATTER ; STAR-FORMATION ; OCCUPATION DISTRIBUTION ; COMPREHENSIVE ANALYSIS ; SATELLITE GALAXIES ; CLUSTER GALAXIES ; FIELD GALAXIES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000292740500045 |
| 源URL | [http://119.78.226.72/handle/331011/26404]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Max Planck Inst Astrophys, D-85748 Garching, Germany 2.Max Planck Inst Extraterr Phys, D-85748 Garching, Germany 3.Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands 4.Chinese Acad Sci, Max Planck Inst Partner Grp, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, Shanghai 200030, Peoples R China 5.Univ Calif Irvine, Ctr Galaxy Evolut, Irvine, CA 92697 USA |
| 推荐引用方式 GB/T 7714 | Neistein, Eyal,Weinmann, Simone M.,Li, Cheng,et al. Linking haloes to galaxies: how many halo properties are needed?[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,414(2):1405-1417. |
| APA | Neistein, Eyal,Weinmann, Simone M.,Li, Cheng,&Boylan-Kolchin, Michael.(2011).Linking haloes to galaxies: how many halo properties are needed?.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,414(2),1405-1417. |
| MLA | Neistein, Eyal,et al."Linking haloes to galaxies: how many halo properties are needed?".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 414.2(2011):1405-1417. |
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来源：上海天文台
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