Weak lensing by galaxies in groups and clusters - I. Theoretical expectations
文献类型：期刊论文
| 作者 | Yang, Xiaohu; Mo, H. J.; van den Bosch, Frank C.; Jing, Y. P.; Weinmann, Simone M.; Meneghetti, M. |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2006-12-11 |
| 卷号 | 373期号:3页码:1159-1172 |
| 关键词 | gravitational lensing methods : statistical galaxies : haloes dark matter large-scale structure of universe |
| 英文摘要 | Galaxy-galaxy lensing is rapidly becoming one of the most promising means to accurately measure the average relation between galaxy properties and halo mass. In order to obtain a signal of sufficient signal-to-noise ratio, one needs to stack many lens galaxies according to their property of interest, such as luminosity or stellar mass. Since such a stack consists of both central and satellite galaxies, which contribute very different lensing signals, the resulting shear measurements can be difficult to interpret. In the past, galaxy-galaxy lensing studies either have completely ignored this problem, have applied rough isolation criteria in an attempt to preferentially select 'central' galaxies, or have tried to model the contribution of satellites explicitly. However, if one is able to a priori split the galaxy population in central and satellite galaxies, one can measure their lensing signals separately. This not only allows a much cleaner measurement of the relation between halo mass and their galaxy populations, but also allows a direct measurement of the subhalo masses around satellite galaxies. In this paper, we use a realistic mock galaxy redshift survey to show that galaxy groups, properly selected from large galaxy surveys, can be used to accurately split the galaxy population in centrals and satellites. Stacking the resulting centrals according to their group mass, estimated from the total group luminosity, allows a remarkably accurate recovery of the masses and density profiles of their host haloes. In addition, stacking the corresponding satellite galaxies according to their projected distance from the group centre yields a lensing signal that can be used to accurate measure the masses of both subhaloes and host haloes. We conclude that an application of galaxy-galaxy lensing measurements to group catalogues extracted from large galaxy redshift surveys offers a unique opportunity to accurately constrain the galaxy-dark matter connection. |
| 学科主题 | 星系和宇宙学研究中心 |
| 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 ; UNIVERSAL DENSITY PROFILE ; MASS CORRELATION-FUNCTION ; N-BODY SIMULATIONS ; HUBBLE DEEP FIELD ; TO-LIGHT RATIOS ; OCCUPATION DISTRIBUTION ; STAR-FORMATION ; DISSIPATIONLESS SIMULATIONS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000243152900017 |
| 公开日期 | 2010-11-08 |
| 源URL | [http://119.78.226.72//handle/331011/11919]  |
| 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.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 3.Max Planck Inst Astron, D-69117 Heidelberg, Germany 4.Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland 5.Univ Heidelberg, Zentrum Astron, ITA, D-69120 Heidelberg, Germany 6.Shanghai Astron Observ, JOINGC, Shanghai, Peoples R China 7.Univ Sci & Technol China, Shanghai, Peoples R China 8.Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy |
| 推荐引用方式 GB/T 7714 | Yang, Xiaohu,Mo, H. J.,van den Bosch, Frank C.,et al. Weak lensing by galaxies in groups and clusters - I. Theoretical expectations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2006,373(3):1159-1172. |
| APA | Yang, Xiaohu,Mo, H. J.,van den Bosch, Frank C.,Jing, Y. P.,Weinmann, Simone M.,&Meneghetti, M..(2006).Weak lensing by galaxies in groups and clusters - I. Theoretical expectations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,373(3),1159-1172. |
| MLA | Yang, Xiaohu,et al."Weak lensing by galaxies in groups and clusters - I. Theoretical expectations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 373.3(2006):1159-1172. |
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来源：上海天文台
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