STELLAR MASS VERSUS STELLAR VELOCITY DISPERSION: WHICH IS BETTER FOR LINKING GALAXIES TO THEIR DARK MATTER HALOS?
文献类型：期刊论文
| 作者 | Li, Cheng1,2; Wang, Lixin1,2; Jing, Y. P.3 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2013 |
| 卷号 | 762期号:1 |
| 关键词 | dark matter galaxies: halos large-scale structure of universe methods: statistical |
| 英文摘要 | It was recently suggested that compared to its stellar mass (M-*), the central stellar velocity dispersion (sigma(*)) of a galaxy might be a better indicator for its host dark matter halo mass. Here we test this hypothesis by estimating the dark matter halo mass for central galaxies in groups as a function of M-* and sigma(*). For this we have estimated the redshift-space cross-correlation function (CCF) between the central galaxies at given M-* and sigma(*) and a reference galaxy sample, from which we determine both the projected CCF, w(p) (r(p)), and the velocity dispersion profile. A halo mass is then obtained from the average velocity dispersion within the virial radius. At fixed M-*, we find very weak or no correlation between halo mass and sigma(*). In contrast, strong mass dependence is clearly seen even when sigma(*) is limited to a narrow range. Our results thus firmly demonstrate that the stellar mass of central galaxies is still a good (if not the best) indicator for dark matter halo mass, better than the stellar velocity dispersion. The dependence of galaxy clustering on sigma(*) at fixed M*, as recently discovered by Wake et al., may be attributed to satellite galaxies, for which the tidal stripping occurring within halos has stronger effect on stellar mass than on central stellar velocity dispersion. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL SKY SURVEY ; SATELLITE KINEMATICS ; LUMINOSITY ; CATALOG ; SDSS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000312488400007 |
| 公开日期 | 2014-09-22 |
| 源URL | [http://119.78.226.72//handle/331011/15179]  |
| 专题 | 上海天文台_空间导航与定位技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Max Planck Inst Astrophys, Partner Grp, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 3.Shanghai Jiao Tong Univ, Dept Phys, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Cheng,Wang, Lixin,Jing, Y. P.. STELLAR MASS VERSUS STELLAR VELOCITY DISPERSION: WHICH IS BETTER FOR LINKING GALAXIES TO THEIR DARK MATTER HALOS?[J]. ASTROPHYSICAL JOURNAL LETTERS,2013,762(1). |
| APA | Li, Cheng,Wang, Lixin,&Jing, Y. P..(2013).STELLAR MASS VERSUS STELLAR VELOCITY DISPERSION: WHICH IS BETTER FOR LINKING GALAXIES TO THEIR DARK MATTER HALOS?.ASTROPHYSICAL JOURNAL LETTERS,762(1). |
| MLA | Li, Cheng,et al."STELLAR MASS VERSUS STELLAR VELOCITY DISPERSION: WHICH IS BETTER FOR LINKING GALAXIES TO THEIR DARK MATTER HALOS?".ASTROPHYSICAL JOURNAL LETTERS 762.1(2013). |
入库方式： OAI收割
来源：上海天文台
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