A search for clusters and groups of galaxies on the line of sight towards 8 lensed quasars

被引：27

作者：

Faure, C

Alloin, D

Kneib, JP

Courbin, F

机构：

[1] Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile

[2] European So Observ, Santiago 19, Chile

[3] Observ Midi Pyrenees, UMR 5572, F-31400 Toulouse, France

[4] CEA, SAp, CNRS, URA 2052, F-91191 Gif Sur Yvette, France

[5] CALTECH, Dept Astron, Pasadena, CA 91125 USA

[6] Univ Liege, Fac Sci, Inst Astrophys & Geophys, Liege 1, Belgium

来源：

ASTRONOMY & ASTROPHYSICS | 2004年 / 428卷 / 03期

关键词：

galaxies : clusters : general; gravitational lensing;

D O I：

10.1051/0004-6361:20040406

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper we present new ESO/VLT FORS1 and ISAAC images of the fields around eight gravitationally lensed quasars: CTQ 414, HE 0230-2130, LBQS 1009-0252, B 1030+074, HE 1104-1805, B 1359+154, H 1413+117 and HE 2149-2745. When available and deep enough, HST/WFPC2 data were also used to infer the photometric redshifts of the galaxies around the quasars. The search of galaxy overdensities in space and redshift, as well as a weak-shear analysis and a mass reconstruction are presented in this paper. We find that there are most probably galaxy groups towards CTQ 414, HE 0230-2130, B 1359+154, H 1413+117 and HE 2149-2745, with masses <4x10(14) M-circle dot h(-1). Considering its photometric redshift, the galaxy group discovered in the field around HE 1104-1805 is associated with the quasar rather than with the lensing potential.

引用

页码：741 / 755

页数：15

共 66 条

[51] ON THE POSSIBILITY OF DETERMINING HUBBLES PARAMETER AND THE MASSES OF GALAXIES FROM THE GRAVITATIONAL LENS EFFECT [J].