Satellite abundances around bright isolated galaxies - II. Radial distribution and environmental effects
文献类型：期刊论文
| 作者 | Wang, Wenting1,2,3; Sales, Laura V.1,4; Henriques, Bruno M. B.1; White, Simon D. M.1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2014-08-01 |
| 卷号 | 442期号:2页码:1363-1378 |
| 关键词 | galaxies: abundances galaxies: evolution galaxies: haloes dark matter |
| 英文摘要 | We use the Eighth Data Release of the Sloan Digital Sky Survey (SDSS/DR8) galaxy sample to study the radial distribution of satellite galaxies around isolated primaries, comparing to semi-analytic models of galaxy formation based on the Millennium and Millennium-II simulations. SDSS satellites behave differently around high- and low-mass primaries: those orbiting objects with M-* > 10(11) M-aS (TM) are mostly red and are less concentrated towards their host than the inferred dark matter halo, an effect that is very pronounced for the few blue satellites. On the other hand, less massive primaries have steeper satellite profiles that agree quite well with the expected dark matter distribution and are dominated by blue satellites, even in the inner regions where strong environmental effects are expected. In fact, such effects appear to be strong only for primaries with M-* > 10(11) M-aS (TM). This behaviour is not reproduced by current semi-analytic simulations, where satellite profiles always parallel those of the dark matter and satellite populations are predominantly red for primaries of all masses. The disagreement with SDSS suggests that environmental effects are too efficient in the models. Modifying the treatment of environmental and star formation processes can substantially increase the fraction of blue satellites, but their radial distribution remains significantly shallower than observed. It seems that most satellites of low-mass primaries can continue to form stars even after orbiting within their joint halo for 5 Gyr or more. |
| 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 ; NUMBER DENSITY PROFILES ; DARK-MATTER HALOES ; QUENCHING TIME-SCALES ; STAR-FORMATION ; SPATIAL-DISTRIBUTION ; REDSHIFT SURVEY ; GALACTIC SATELLITES ; PHYSICAL-PROPERTIES ; INTRACLUSTER LIGHT |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000339423100034 |
| 源URL | [http://119.78.226.72/handle/331011/18192]  |
| 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-85741 Garching, Germany 2.Chinese Acad Sci, Max Panck Inst Partner Grp, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 3.Univ Durham, Inst Computat Cosmol, Durham DH1 3LE, England 4.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA |
| 推荐引用方式 GB/T 7714 | Wang, Wenting,Sales, Laura V.,Henriques, Bruno M. B.,et al. Satellite abundances around bright isolated galaxies - II. Radial distribution and environmental effects[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,442(2):1363-1378. |
| APA | Wang, Wenting,Sales, Laura V.,Henriques, Bruno M. B.,&White, Simon D. M..(2014).Satellite abundances around bright isolated galaxies - II. Radial distribution and environmental effects.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,442(2),1363-1378. |
| MLA | Wang, Wenting,et al."Satellite abundances around bright isolated galaxies - II. Radial distribution and environmental effects".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 442.2(2014):1363-1378. |
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来源：上海天文台
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