First galaxy-galaxy lensing measurement of satellite halo mass in the CFHT Stripe-82 Survey

被引：36

作者：

Li, Ran ^{[1
]}

Shan, Huanyuan ^{[2
]}

Mo, Houjun ^{[3
]}

Kneib, Jean-Paul ^{[2
,4
]}

Yang, Xiaohu ^{[5
,6
]}

Luo, Wentao ^{[6
]}

van den Bosch, Frank C. ^{[7
]}

Erben, Thomas ^{[8
]}

Moraes, Bruno ^{[9
]}

Makler, Martin ^{[9
]}

机构：

[1] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

[2] EPFL, Observ Sauverny, Lab Astrophys, CH-1290 Versoix, Switzerland

[3] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA

[4] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

[5] Shanghai Jiao Tong Univ, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China

[6] Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China

[7] Yale Univ, Dept Astron, New Haven, CT 06520 USA

[8] Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany

[9] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, RJ, Brazil

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2014年 / 438卷 / 04期

基金：

美国国家科学基金会; 瑞士国家科学基金会;

关键词：

gravitational lensing: weak; galaxies: clusters: general; galaxies: haloes; dark matter; DARK-MATTER HALOS; DIGITAL SKY SURVEY; STELLAR MASS; SHAPE MEASUREMENT; DENSITY PROFILE; SUBSTRUCTURE; LUMINOSITY; I; STATISTICS; TRUNCATION;

D O I：

10.1093/mnras/stt2395

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We select satellite galaxies from the galaxy group catalogue constructed with the Sloan Digital Sky Survey spectroscopic galaxies and measure the tangential shear around these galaxies with the source catalogue extracted from the Canada-France-Hawaii Telescope Stripe-82 Survey. Using the tangential shear, we constrain the mass of subhaloes associated with these satellites. The lensing signal is measured around satellites in groups with masses in the range 10(13)-5 x 10(14) h (1) M-circle dot, and is found to agree well with theoretical expectations. Fitting the data with a truncated NFW profile, we obtain an average subhalo mass of log (M-sub/h (-1) M-circle dot) = 11.68 +/- 0.67 for satellites whose projected distances to central galaxies are in the range 0.1-0.3 h (1) Mpc and log (M-sub/h (1) M-circle dot) = 11.68 +/- 0.76 for satellites with projected halo-centric distance in [0.3, 0.5]h (1) Mpc. The best-fitting subhalo masses are comparable to the truncated subhalomasses assigned to satellite galaxies using abundance matching and are about 5-10 times higher than the average stellar mass of the lensing satellite galaxies.

引用

页码：2864 / 2870

页数：7

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