High-resolution observations and mass modelling of the CLASS gravitational lens B1152+199
Biggs, A. D.; Browne, I. W. A.; Wilkinson, P. N.; Myers, S. T.; Rusin, D.; Jackson, N. J.; Marlow, D. R.; Norbury, M.
United States, United Kingdom
Abstract
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 , we find that at 2σ confidence. Including a second deflector to represent a possible satellite galaxy of the primary lens leads to slightly steeper mass profiles.