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CLASS B2108+213: a new wide-separation gravitational lens system

McKean, J. P. and Browne, I. W. A. and Jackson, N. J. and Koopmans, L. V. E. and Norbury, M. A. and Treu, T. and York, T. D. and Biggs, A. D. and Blandford, R. D. and de Bruyn, A. G. and Fassnacht, C. D. and Mao, S. and Myers, S. T. and Pearson, T. J. and Phillips, P. M. and Readhead, A. C. S. and Rusin, D. and Wilkinson, P. N. (2005) CLASS B2108+213: a new wide-separation gravitational lens system. Monthly Notices of the Royal Astronomical Society, 356 (3). pp. 1009-1016. ISSN 0035-8711.

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We present observations of CLASS B2108+213, the widest separation gravitational lens system discovered by the Cosmic Lens All-Sky Survey. Radio imaging using the VLA at 8.46 GHz and MERLIN at 5 GHz shows two compact components separated by 4.56 arcsec with a faint third component in between which we believe is emission from a lensing galaxy. 5-GHz VLBA observations reveal milliarcsecond-scale structure in the two lensed images that is consistent with gravitational lensing. Optical emission from the two lensed images and two lensing galaxies within the Einstein radius is detected in Hubble Space Telescope imaging. Furthermore, an optical gravitational arc, associated with the strongest lensed component, has been detected. Surrounding the system is a number of faint galaxies which may help explain the wide image separation. A plausible mass distribution model for CLASS B2108+213 is also presented.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Koopmans, L. V. E.0000-0003-1840-0312
Treu, T.0000-0002-8460-0390
Biggs, A. D.0000-0002-1117-9961
Blandford, R. D.0000-0002-1854-5506
Fassnacht, C. D.0000-0002-4030-5461
Mao, S.0000-0001-8317-2788
Pearson, T. J.0000-0001-5213-6231
Readhead, A. C. S.0000-0001-9152-961X
Alternate Title:CLASS B2108+213: A new wide separation gravitational lens system
Additional Information:© 2004 RAS. Accepted 2004 October 15. Received 2004 October 15; in original form 2004 August 23. The VLA and VLBA are operated by the National Radio Astronomy Observatory which is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. MERLIN is a national facility operated by the University of Manchester on behalf of PPARC. The results presented herein were based on observations collected with the NASA/ESA HST, obtained at STScI, which is operated by AURA, under NASA contract NAS5-26555. These observations are associated with programme 9744. JPM, MAN, PMP and TDY acknowledge the receipt of PPARC studentships. RDB is supported by NSF grant AST-9900866. TT acknowledges support from NASA through Hubble Fellowship grant HST-HF-01167.01-A. This work was supported by the European Community's Sixth Framework Marie Curie Research Training Network Programme, Contract No. MRTN-CT-2004-505183 ‘ANGLES’.
Funding AgencyGrant Number
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
NASA Hubble FellowshipHST-HF-01167.01-A
Marie Curie FellowshipMRTN-CT-2004-505183 ‘‘ANGLES’’
Subject Keywords:gravitational lensing, quasars: individual: CLASS B2108+213, cosmology: observations
Issue or Number:3
Record Number:CaltechAUTHORS:20190523-125437436
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Official Citation:J. P. McKean, I. W. A. Browne, N. J. Jackson, L. V. E. Koopmans, M. A. Norbury, T. Treu, T. D. York, A. D. Biggs, R. D. Blandford, A. G. De Bruyn, C. D. Fassnacht, S. Mao, S. T. Myers, T. J. Pearson, P. M. Phillips, A. C. S. Readhead, D. Rusin, P. N. Wilkinson, CLASS B2108+213: a new wide-separation gravitational lens system, Monthly Notices of the Royal Astronomical Society, Volume 356, Issue 3, 21 January 2005, Pages 1009–1016,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95742
Deposited By: George Porter
Deposited On:23 May 2019 22:54
Last Modified:03 Oct 2019 21:16

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