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The anatomy of a quadruply imaged gravitational lens system

Suyu, S. H. and Blandford, R. D. (2006) The anatomy of a quadruply imaged gravitational lens system. Monthly Notices of the Royal Astronomical Society, 366 (1). pp. 39-48. ISSN 0035-8711.

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The key to using a strong gravitational lens system to measure the Hubble constant is to obtain an accurate model of the lens potential. In this paper, we investigate the properties of gravitational lens B1608+656, a quadruply imaged lens system with an extended source intensity distribution. Our analysis is valid for generic quadruply lensed systems. Limit curves and isophotal separatrices are defined for such systems, and we show that the isophotal separatrices must intersect at the critical curves and the satellite isophotes must be tangent to the limit curves. The most recent model of B1608+656 by Koopmans et al. satisfies these criteria for some, but not all, of the isophotal separatrices within the observational uncertainty. We study a non-parametric method of potential reconstruction proposed by Blandford, Surpi & Kundic and demonstrate that although the method works in principle and elucidates image formation, the initial potential only converges to the true model when it is within ∼1 per cent of the true model.

Item Type:Article
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URLURL TypeDescription Paper
Blandford, R. D.0000-0002-1854-5506
Additional Information:© 2005 The Authors. Journal compilation © 2005 RAS. Accepted 2005 November 9. Received 2005 October 19; in original form 2005 June 27. We thank C. Fassnacht, L. Koopmans, P. Marshall, T. Kundic, G. Surpi and T. Treu for useful discussions and encouragement. We thank the referee for comments that improved the presentation of the paper. SS thanks I. Mandel for commenting on the manuscript. This work was supported by the NSF under award no AST04-44059 and in part by the US Department of Energy under contract number DE-AC02-76SF00515. SS acknowledges the support of the NSERC (Canada) through the Postgraduate Scholarship.
Funding AgencyGrant Number
NASAAST 04-44059
Department of Energy (DOE)DE-AC02-76SF00515
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Subject Keywords:gravitational lensing, galaxies: individual: B1608+656
Issue or Number:1
Record Number:CaltechAUTHORS:20190523-125437208
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Official Citation:S. H. Suyu, R. D. Blandford, The anatomy of a quadruply imaged gravitational lens system, Monthly Notices of the Royal Astronomical Society, Volume 366, Issue 1, 11 February 2006, Pages 39–48,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95740
Deposited By: George Porter
Deposited On:23 May 2019 22:30
Last Modified:03 Oct 2019 21:16

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