EAS Publications Series
Volume 20, 2006Mass Profiles and Shapes of Cosmological Structures
|Page(s)||149 - 152|
|Published online||19 May 2006|
G.A. Mamon, F. Combes, C. Deffayet and B. Fort (eds)
EAS Publications Series, 20 (2006) 149-152
Non-parametric mass profiles of a unique elliptical galaxy at a redshift of 1
Canada-France-Hawaii Telescope, Kamuela, Hawaii 96743, USA
2 European Southern Observatory, Santiago 19001, Chile
3 MIT Kavli Institute for Astrophysics, MIT, Cambridge, MA 02139, USA
4 Astronomy Unit, Queen Mary College, University of London, London E1 4NS, UK
The serendipitous discovery of a gravitational lens system formed by an elliptical galaxy at z ~ 1 and a post-starburst galaxy at z ~ 3.8 brings a unique opportunity to study in detail the mass profile of a massive and relaxed object at a look back time of half the age of the universe. We sketch here a comparison of different methods to reconstruct the mass of the lens, both parametrically and non-parametrically, highlighting their advantanges and limitations.
© EAS, EDP Sciences, 2006
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