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Galaxy-Galaxy Weak-lensing Measurements from SDSS. II. Host Halo Properties of Galaxy Groups
Luo, Wentao1; Yang, Xiaohu1,2,3; Lu, Tianhuan4; Shi, Feng5; Zhang, Jun1; Mo, H. J.6,7,8; Shu, Chenggang9; Fu, Liping9; Radovich, Mario10,11; Zhang, Jiajun1; Li, Nan12; Sunayama, Tomomi13; Wang, Lei14
2018-07-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume862Issue:1Pages:12
Corresponding AuthorLuo, Wentao(wentao.luo82@sjtu.edu.cn)
AbstractIn 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.
Keywordgalaxies: clusters: general gravitational lensing: weak
DOI10.3847/1538-4357/aacaf1
WOS KeywordDIGITAL SKY SURVEY ; MASS CORRELATION-FUNCTION ; LARGE-SCALE STRUCTURE ; DARK-MATTER ; COSMOLOGICAL CONSTRAINTS ; SHAPE MEASUREMENT ; REDMAPPER CLUSTERS ; III. APPLICATION ; COSMIC SHEAR ; STELLAR MASS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000439236600004
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/32622
Collection中国科学院紫金山天文台
Corresponding AuthorLuo, Wentao
Affiliation1.Shanghai Jiao Tong Univ, Dept Astron, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China
2.Shanghai Jiao Tong Univ, IFSA Collaborat Innovat Ctr, Shanghai 200240, Peoples R China
3.Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China
4.Shanghai Jiao Tong Univ, Zhiyuan Coll, Shanghai 200240, Peoples R China
5.Shanghai Astron Observ, Nandan Rd 80, Shanghai 200030, Peoples R China
6.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA
7.Tsinghua Univ, Phys Dept, Beijing 10084, Peoples R China
8.Tsinghua Univ, Ctr Astrophys, Beijing 10084, Peoples R China
9.Shanghai Normal Univ, Shanghai Key Lab Astrophys, 100 Guilin Rd, Shanghai 200234, Peoples R China
10.INAF, Osservatorio Astron Napoli, Via Moiariello 16, I-80131 Naples, Italy
11.INAF, Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
12.Univ Nottingham, Ctr Astron & Particle Theory, Nottingham NG7 2RD, England
13.Univ Tokyo, Kavli Inst Phys & Math Universe, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan
14.Chinese Acad Sci, Purple Mt Observ, 8 Yuanhua Rd, Nanjing 210023, Jiangsu, Peoples R China
Recommended Citation
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.
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