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Galaxy groups in the SDSS DR4. I. The catalog and basic properties
文献类型：期刊论文
| 作者 | Xiaohu Yang1,2,3; Mo, H. J.4; Van den Bosch, Frank C.5; Pasquali, Anna5; Li, Cheng1,2,3; Barden, Marco5,6 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2007-12-10 |
| 卷号 | 671期号:1页码:153-170 |
| 关键词 | dark matter galaxies : halos large-scale structure of universe methods : statistical |
| 英文摘要 | We use a modified version of the halo-based group finder developed by Yang et al. to select galaxy groups from the Sloan Digital Sky Survey (SDSS DR4). In the first step, a combination of two methods is used to identify the centers of potential groups and to estimate their characteristic luminosity. Using an iterative approach, the adaptive group finder then uses the average mass-to-light ratios of groups, obtained from the previous iteration, to assign a tentative mass to each group. This mass is then 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. Finally, each individual group is assigned two different halo masses: one based on its characteristic luminosity and the other based on its characteristic stellar mass. Applying the group finder to the SDSS DR4, we obtain 301,237 groups in a broad dynamic range, including systems of isolated galaxies. We use detailed mock galaxy catalogs constructed for the SDSS DR4 to test the performance of our group finder in terms of completeness of true members, contamination by interlopers, and accuracy of the assigned masses. This paper is the first in a series and focuses on the selection procedure, tests of the reliability of the group finder, and the basic properties of the group catalog (e. g., the mass-to-light ratios, the halo mass-to-stellar mass ratios). The group catalogs including the membership of the groups are available on request. |
| 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 ; DARK-MATTER HALOES ; LARGE-SCALE STRUCTURE ; REDSHIFT SURVEY ; DATA RELEASE ; LUMINOSITY FUNCTION ; STAR-FORMATION ; OCCUPATION DISTRIBUTION ; VELOCITY DISPERSION ; COMMISSIONING DATA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000253331400015 |
| 源URL | [http://119.78.226.72/handle/331011/19451]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Shanghai Astron Observ, Partner Grp MPA, Shanghai 200030, Peoples R China 2.Shanghai Astron Observ, Joint Inst Galaxy & Cosmol, Shanghai, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 5.Max Planck Inst Astron, D-69117 Heidelberg, Germany 6.Leopold Franzens Univ Innsbruck, Inst Astrophys, A-6020 Innsbruck, Austria |
| 推荐引用方式 GB/T 7714 | Xiaohu Yang,Mo, H. J.,Van den Bosch, Frank C.,et al. Galaxy groups in the SDSS DR4. I. The catalog and basic properties[J]. ASTROPHYSICAL JOURNAL,2007,671(1):153-170. |
| APA | Xiaohu Yang,Mo, H. J.,Van den Bosch, Frank C.,Pasquali, Anna,Li, Cheng,&Barden, Marco.(2007).Galaxy groups in the SDSS DR4. I. The catalog and basic properties.ASTROPHYSICAL JOURNAL,671(1),153-170. |
| MLA | Xiaohu Yang,et al."Galaxy groups in the SDSS DR4. I. The catalog and basic properties".ASTROPHYSICAL JOURNAL 671.1(2007):153-170. |
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来源：上海天文台
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