Assessing colour-dependent occupation statistics inferred from galaxy group catalogues
文献类型：期刊论文
| 作者 | Campbell, Duncan1; van den Bosch, Frank C.1; Hearin, Andrew2; Padmanabhan, Nikhil2; Berlind, Andreas3; Mo, H. J.4; Tinker, Jeremy5; Yang, Xiaohu6,7 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2015-09-01 |
| 卷号 | 452期号:1页码:444-469 |
| 关键词 | methods: statistical galaxies: clusters: general galaxies: evolution galaxies: haloes galaxies: statistics |
| 英文摘要 | We investigate the ability of current implementations of galaxy group finders to recover colour-dependent halo occupation statistics. To test the fidelity of group catalogue inferred statistics, we run three different group finders used in the literature over a mock that includes galaxy colours in a realistic manner. Overall, the resulting mock group catalogues are remarkably similar, and most colour-dependent statistics are recovered with reasonable accuracy. However, it is also clear that certain systematic errors arise as a consequence of correlated errors in group membership determination, central/satellite designation, and halo mass assignment. We introduce a new statistic, the halo transition probability (HTP), which captures the combined impact of all these errors. As a rule of thumb, errors tend to equalize the properties of distinct galaxy populations (i.e. red versus blue galaxies or centrals versus satellites), and to result in inferred occupation statistics that are more accurate for red galaxies than for blue galaxies. A statistic that is particularly poorly recovered from the group catalogues is the red fraction of central galaxies as a function of halo mass. Group finders do a good job in recovering galactic conformity, but also have a tendency to introduce weak conformity when none is present. We conclude that proper inference of colour-dependent statistics from group catalogues is best achieved using forward modelling (i.e. running group finders over mock data) or by implementing a correction scheme based on the HTP, as long as the latter is not too strongly model dependent. |
| 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 ; OF-FRIENDS ALGORITHM ; BRIGHTEST HALO GALAXIES ; BAND OPTICAL-PROPERTIES ; STELLAR MASS FUNCTIONS ; DARK-MATTER HALOES ; REDSHIFT SURVEY ; STAR-FORMATION ; SATELLITE GALAXIES ; RED SEQUENCE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000360851100033 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://119.78.226.72/handle/331011/28251]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Yale Univ, Dept Astron, New Haven, CT 06511 USA 2.Yale Univ, Dept Phys, New Haven, CT 06520 USA 3.Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA 4.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 5.NYU, Ctr Cosmol & Particle Phys, Dept Phys, New York, NY 10003 USA 6.Shanghai Jiao Tong Univ, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China 7.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Campbell, Duncan,van den Bosch, Frank C.,Hearin, Andrew,et al. Assessing colour-dependent occupation statistics inferred from galaxy group catalogues[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,452(1):444-469. |
| APA | Campbell, Duncan.,van den Bosch, Frank C..,Hearin, Andrew.,Padmanabhan, Nikhil.,Berlind, Andreas.,...&Yang, Xiaohu.(2015).Assessing colour-dependent occupation statistics inferred from galaxy group catalogues.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,452(1),444-469. |
| MLA | Campbell, Duncan,et al."Assessing colour-dependent occupation statistics inferred from galaxy group catalogues".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 452.1(2015):444-469. |
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来源：上海天文台
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