High-resolution observations and mass modelling of the CLASS gravitational lens B1152+199 |
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| Authors: | DRusin † MNorbury A DBiggs D RMarlow N JJackson I W ABrowne P NWilkinson S TMyers |
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| Institution: | 1Department of Physics &Astronomy, University of Pennsylvania, Philadelphia, PA 19104-6396, USA; 2Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire SK11 9DL; 3National Radio Astronomy Observatory, PO Box 0, Socorro, NM, 87801, USA |
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| 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 Σ(r)∝r? β , we find that 0.95 β 1.21 at 2 σ confidence. Including a second deflector to represent a possible satellite galaxy of the primary lens leads to slightly steeper mass profiles. |
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| Keywords: | gravitational lensing galaxies: structure |
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