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Density reconstruction from 3D lensing: Application to galaxy clusters

Published online by Cambridge University Press:  01 July 2015

François Lanusse
Affiliation:
Laboratoire AIM, UMR CEA-CNRS-Paris 7, Irfu, Service d'Astrophysique, CEA Saclay, F-91191 Gif-Sur-Yvette CEDEX, France email: [email protected]
Adrienne Leonard
Affiliation:
Department of Physics and Astronomy, University College London, Gower Place, London WC1E 6BT, U.K. email: [email protected]
Jean-Luc Starck
Affiliation:
Laboratoire AIM, UMR CEA-CNRS-Paris 7, Irfu, Service d'Astrophysique, CEA Saclay, F-91191 Gif-Sur-Yvette CEDEX, France email: [email protected]
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Abstract

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Using the 3D information provided by photometric or spectroscopic weak lensing surveys, it has become possible in the last few years to address the problem of mapping the matter density contrast in three dimensions from gravitational lensing. We recently proposed a new non linear sparsity based reconstruction method allowing for high resolution reconstruction of the over-density. This new technique represents a significant improvement over previous linear methods and opens the way to new applications of 3D weak lensing density reconstruction. In particular, we demonstrate that for the first time reconstructed over-density maps can be used to detect and characterise galaxy clusters in mass and redshift.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2015 

References

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