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

D. Valls–Gabaud; R. Cabanac; C. Lidman; J.M. Diego; P. Saha

doi:10.1051/eas:2006062

All issues

Volume 20 (2006)

EAS Publications Series, 20 (2006) 149-152

Abstract

Issue		EAS Publications Series Volume 20, 2006 Mass Profiles and Shapes of Cosmological Structures


Page(s)		149 - 152
DOI		https://doi.org/10.1051/eas:2006062
Published online		19 May 2006

Mass Profiles and Shapes of Cosmological Structures
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

D. Valls–Gabaud¹, R. Cabanac¹, C. Lidman², J.M. Diego³ and P. Saha⁴

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

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.