THE STATISTICAL NATURE OF THE BRIGHTEST GROUP GALAXIES
文献类型：期刊论文
| 作者 | Shen, Shiyin1,2 ; Yang, Xiaohu1,3; Mo, Houjun4; van den Bosch, Frank5; More, Surhud6
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-02-10 |
| 卷号 | 782期号:1页码:23 |
| 关键词 | galaxies: clusters: general galaxies: general galaxies: groups: general galaxies: halos galaxies: statistics |
| 通讯作者 | 沈世银 |
| 英文摘要 | We examine the statistical properties of the brightest group galaxies (BGGs) by using a complete spectroscopic sample of groups/clusters of galaxies selected from the Data Release 7 of the Sloan Digital Sky Survey. We test whether BGGs and other bright members of groups are consistent with an ordered population among the total population of group galaxies. We find that the luminosity distributions of BGGs do not follow the predictions from the order statistics (OS). The average luminosities of BGGs are systematically brighter than OS predictions. On the other hand, by properly taking into account the brightening effect of the BGGs, the luminosity distributions of the second brightest galaxies are in excellent agreement with the expectations of OS. The brightening of BGGs relative to the OS expectation is consistent with a scenario that the BGGs on average have overgrown about 20% masses relative to the other member galaxies. The growth (Delta M) is not stochastic but correlated with the magnitude gap (G(1,2)) between the brightest and the second brightest galaxy. The growth (Delta M) is larger for the groups having more prominent BGGs (larger G(1,2)) and averagely contributes about 30% of the final G(1,2) of the groups 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] | DIGITAL-SKY-SURVEY ; GALACTIC NUCLEUS FEEDBACK ; CLUSTER GALAXIES ; LUMINOSITY FUNCTION ; SATELLITE GALAXIES ; RICHNESS RELATION ; STAR-FORMATION ; RED SEQUENCE ; MASS ; SDSS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000331848200023 |
| 公开日期 | 2015-02-14 |
| 源URL | [http://119.78.226.72//handle/331011/15802]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Key Lab Astrophys, Shanghai 200234, Peoples R China 3.Shanghai Jiao Tong Univ, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China 4.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 5.Yale Univ, Dept Astron, New Haven, CT 06520 USA 6.Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA |
| 推荐引用方式 GB/T 7714 | Shen, Shiyin,Yang, Xiaohu,Mo, Houjun,et al. THE STATISTICAL NATURE OF THE BRIGHTEST GROUP GALAXIES[J]. ASTROPHYSICAL JOURNAL,2014,782(1):23. |
| APA | Shen, Shiyin,Yang, Xiaohu,Mo, Houjun,van den Bosch, Frank,&More, Surhud.(2014).THE STATISTICAL NATURE OF THE BRIGHTEST GROUP GALAXIES.ASTROPHYSICAL JOURNAL,782(1),23. |
| MLA | Shen, Shiyin,et al."THE STATISTICAL NATURE OF THE BRIGHTEST GROUP GALAXIES".ASTROPHYSICAL JOURNAL 782.1(2014):23. |
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来源：上海天文台
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