热门
A halo-based galaxy group finder: calibration and application to the 2dFGRS
文献类型：期刊论文
| 作者 | Yang, XH; Mo, HJ; van den Bosch, FC; Jing, YP |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2005-02-01 |
| 卷号 | 356期号:4页码:1293-1307 |
| 关键词 | methods : statistical galaxies : haloes dark matter large-scale structure of the Universe |
| 英文摘要 | We use the halo occupation model to calibrate galaxy group finders in magnitude limited redshift surveys. Because, according to the current scenario of structure formation, galaxy groups are associated with cold dark matter (CDM) haloes, we make use of the properties of the halo population in the design of our group finder. The method starts with an assumed mass-to-light ratio to assign a tentative mass to each group. This mass is used to estimate the size and velocity dispersion of the underlying halo that hosts the group, which in turn is used to determine group membership (in redshift space). This procedure is repeated until no further changes occur in group memberships. We find that the final groups selected this way are insensitive to the mass-to-light ratio assumed. We use mock catalogues, constructed using the conditional luminosity function (CLF), to test the performance of our group finder in terms of completeness of true members and contamination by interlopers. Our group finder is more successful than the conventional friends-of-friends (FOF) group finder in assigning galaxies in common dark matter haloes to a single group. We apply our group finder to the 2-degree Field Galaxy Redshift Survey (2dFGRS) and compare the resulting group properties with model predictions based on the CLF. For the CDM concordance cosmology, we find a clear discrepancy between the model and data in the sense that the model predicts too many rich groups. In order to match the observational results, we have to either increase the mass-to-light ratios of rich clusters to a level significantly higher than current observational estimates, or to assume sigma(8) similar or equal to 0.7, compared with the concordance value of 0.9. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DARK-MATTER HALOES ; DIGITAL SKY SURVEY ; SPACE POWER SPECTRUM ; TO-LIGHT FUNCTION ; X-RAY-PROPERTIES ; REDSHIFT SURVEY ; LUMINOSITY FUNCTION ; OCCUPATION DISTRIBUTION ; HIERARCHICAL UNIVERSE ; VELOCITY DISPERSION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000226423100009 |
| 源URL | [http://119.78.226.72/handle/331011/19395]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 2.ETH Honggerberg, Swiss Fed Inst Technol, Dept Phys, CH-8093 Zurich, Switzerland 3.Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, XH,Mo, HJ,van den Bosch, FC,et al. A halo-based galaxy group finder: calibration and application to the 2dFGRS[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2005,356(4):1293-1307. |
| APA | Yang, XH,Mo, HJ,van den Bosch, FC,&Jing, YP.(2005).A halo-based galaxy group finder: calibration and application to the 2dFGRS.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,356(4),1293-1307. |
| MLA | Yang, XH,et al."A halo-based galaxy group finder: calibration and application to the 2dFGRS".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 356.4(2005):1293-1307. |
入库方式： OAI收割
来源：上海天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。