High-resolution observations and mass modelling of the CLASS gravitational lens B1152+199

被引:57
作者
Rusin, D
Norbury, M
Biggs, AD
Marlow, DR
Jackson, NJ
Browne, IWA
Wilkinson, PN
Myers, ST
机构
[1] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[2] Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England
[3] Natl Radio Astron Observ, Socorro, NM 87801 USA
关键词
gravitational lensing; galaxies : structure;
D O I
10.1046/j.1365-8711.2002.05043.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a series of high-resolution radio and optical observations of the CLASS gravitational lens system B1152+199 obtained with the Multi-Element Radio-Linked Interferometer Network, Very Long Baseline Array and Hubble Space Telescope. Based on the milliarcsecond-scale substructure of the lensed radio components and precise optical astrometry for the lensing galaxy, we construct models for the system and place constraints on the galaxy mass profile. For a single galaxy model with surface mass density Sigma(r) proportional to r(-beta), we find that 0.95 less than or equal to beta less than or equal to 1.21 at 2sigma confidence. Including a second deflector to represent a possible satellite galaxy of the primary lens leads to slightly steeper mass profiles.
引用
收藏
页码:205 / 211
页数:7
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