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Non-parametric mass profiles of a unique elliptical galaxy at a redshift of 1

Published online by Cambridge University Press:  19 May 2006

G.A. Mamon ,
F. Combes ,
C. Deffayet ,
B. Fort ,
D. Valls–Gabaud ,
R. Cabanac ,
C. Lidman ,
J.M. Diego  and
P. Saha
D. Valls–Gabaud
Affiliation:
Canada-France-Hawaii Telescope, Kamuela, Hawaii 96743, USA
R. Cabanac
Affiliation:
Canada-France-Hawaii Telescope, Kamuela, Hawaii 96743, USA
C. Lidman
Affiliation:
European Southern Observatory, Santiago 19001, Chile
J.M. Diego
Affiliation:
MIT Kavli Institute for Astrophysics, MIT, Cambridge, MA 02139, USA
P. Saha
Affiliation:
Astronomy Unit, Queen Mary College, University of London, London E1 4NS, UK
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Abstract

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.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 20: Mass Profiles and Shapes of Cosmological Structures , 2006 , pp. 149 - 152
Copyright
© EAS, EDP Sciences, 2006

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