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Title: Full lensing analysis of Abell 1703: comparison of independent lens-modelling techniques
Authors: Zitrin, Adi
Broadhurst, Tom
Umetsu, Keiichi
Rephaeli, Yoel
Medezinski, Elinor
Bradley, Larry
Jimenez-Teja, Yolanda
Benitez, Narciso
Ford, Holland
De Rijcke, Sven
Dejonghe, Herwig
BEKAERT, Philippe
Issue Date: 2010
Abstract: The inner mass profile of the relaxed cluster Abell 1703 is analysed by two very different strong-lensing techniques applied to the deep Advanced Camera for Surveys and the Wide Field Channel 3 imaging. Our parametric method has the accuracy required to reproduce many sets of multiple images, based on the assumption that mass approximately traces light. We test this assumption with a fully non-parametric, adaptive grid method, with no knowledge of the galaxy distribution. Differences between the methods are seen on fine scales due to member galaxies which must be included in models designed to search for lensed images, but on the larger scale the general distribution of dark matter is in good agreement, with very similar radial mass profiles. We add undiluted weak-lensing measurements from deep multicolour Subaru imaging to obtain a fully model-independent mass profile out to the virial radius and beyond. Consistency is found in the region of overlap between the weak and strong lensing, and the full mass profile is well described by a Navarro, Frenk & White (NFW) model of a concentration parameter, c(vir) similar or equal to 7.15 +/- 0.5 (and M-vir similar or equal to 1.22 +/- 0.15 x 1015 M-circle dot h-1). Abell 1703 lies above the standard c-M relation predicted for the standard Lambda cold dark matter model, similar to other massive relaxed clusters with accurately determined lensing-based profiles.
Notes: [Zitrin, Adi; Broadhurst, Tom; Rephaeli, Yoel; Medezinski, Elinor] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. [Broadhurst, Tom] Univ Basque Cty UPV EHU, Dept Theoret Phys, Leioa, Spain. [Broadhurst, Tom] Basque Fdn Sci, IKERBASQUE, Bilbao 48011, Spain. [Umetsu, Keiichi] Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan. [Bradley, Larry] Space Telescope Sci Inst, Baltimore, MD 21218 USA. [Jimenez-Teja, Yolanda; Benitez, Narciso] CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. [Ford, Holland] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. [Liesenborgs, Jori; Bekaert, Philippe] Univ Hasselt, B-3590 Diepenbeek, Belgium. [De Rijcke, Sven; Dejonghe, Herwig] Univ Ghent, B-9000 Ghent, Belgium. adiz@wise.tau.ac.il
URI: http://hdl.handle.net/1942/11391
DOI: 10.1111/j.1365-2966.2010.17258.x
ISI #: 000283165600049
ISSN: 0035-8711
Category: A1
Type: Journal Contribution
Validation: ecoom, 2011
Appears in Collections: Research publications

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