Galaxy-Galaxy Weak-lensing Measurements from SDSS. II. Host Halo Properties of Galaxy Groups
文献类型：期刊论文
| 作者 | Luo, Wentao14; Yang, Xiaohu12,13,14; Lu, Tianhuan11; Shi, Feng10; Zhang, Jun14; Mo, H. J.7,8,9; Shu, Chenggang6; Fu, Liping6; Radovich, Mario4,5; Zhang, Jiajun14 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018-07-20 |
| 卷号 | 862期号:1页码:12 |
| 关键词 | galaxies: clusters: general gravitational lensing: weak |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aacaf1 |
| 通讯作者 | Luo, Wentao(wentao.luo82@sjtu.edu.cn) |
| 英文摘要 | In this second paper in a series studying galaxy-galaxy lensing signals using Sloan Digital Sky Survey Data Release 7 (SDSS DR7), we present our measurement and modeling of the lensing signals around groups of galaxies. We divide the groups into four halo mass bins and measure the signals around four different halo-center tracers: brightest central galaxies (BCGs), luminosity-weighted centers, number-weighted centers, and X-ray peak positions. For groups cross-identified in both X-ray and SDSS DR7, we further split the groups into low and high X-ray emission subsamples, both of which are assigned to two halo-center tracers, BCGs and X-ray peak positions. The galaxy-galaxy lensing signals show that BCGs, among the four candidates, are the best halo-center tracers. We model the lensing signals using a combination of four contributions: the off-center NFW host halo profile, subhalo contribution, stellar contribution, and projected two-halo term. We sample the posterior of five parameters, i.e., the halo mass, concentration, off-centering distance, subhalo mass, and fraction of subhalos, via a Monte Carlo Markov Chain (MCMC)package using the galaxy-galaxy lensing signals. After taking into account the sampling effects (e.g., Eddington bias), we found that the best-fit halo masses obtained from lensing signals are quite consistent with those obtained in the group catalog based on an abundance matching method, except in the lowest mass bin. |
| WOS关键词 | DIGITAL SKY SURVEY ; MASS CORRELATION-FUNCTION ; LARGE-SCALE STRUCTURE ; DARK-MATTER ; COSMOLOGICAL CONSTRAINTS ; SHAPE MEASUREMENT ; REDMAPPER CLUSTERS ; III. APPLICATION ; COSMIC SHEAR ; STELLAR MASS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000439236600004 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/32621]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Luo, Wentao |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, 8 Yuanhua Rd, Nanjing 210023, Jiangsu, Peoples R China 2.Univ Tokyo, Kavli Inst Phys & Math Universe, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan 3.Univ Nottingham, Ctr Astron & Particle Theory, Nottingham NG7 2RD, England 4.INAF, Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy 5.INAF, Osservatorio Astron Napoli, Via Moiariello 16, I-80131 Naples, Italy 6.Shanghai Normal Univ, Shanghai Key Lab Astrophys, 100 Guilin Rd, Shanghai 200234, Peoples R China 7.Tsinghua Univ, Ctr Astrophys, Beijing 10084, Peoples R China 8.Tsinghua Univ, Phys Dept, Beijing 10084, Peoples R China 9.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 10.Shanghai Astron Observ, Nandan Rd 80, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo, Wentao,Yang, Xiaohu,Lu, Tianhuan,et al. Galaxy-Galaxy Weak-lensing Measurements from SDSS. II. Host Halo Properties of Galaxy Groups[J]. ASTROPHYSICAL JOURNAL,2018,862(1):12. |
| APA | Luo, Wentao.,Yang, Xiaohu.,Lu, Tianhuan.,Shi, Feng.,Zhang, Jun.,...&Wang, Lei.(2018).Galaxy-Galaxy Weak-lensing Measurements from SDSS. II. Host Halo Properties of Galaxy Groups.ASTROPHYSICAL JOURNAL,862(1),12. |
| MLA | Luo, Wentao,et al."Galaxy-Galaxy Weak-lensing Measurements from SDSS. II. Host Halo Properties of Galaxy Groups".ASTROPHYSICAL JOURNAL 862.1(2018):12. |
入库方式： OAI收割
来源：紫金山天文台
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。