X-raying strong gravitational lenses: dark halos and the environment

Details X-raying strong gravitational lenses: dark halos and the environment X-raying strong gravitational lenses: dark halos and the environment

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...62t&link_type=abstract

XMM-Newton Proposal ID #06023408

Mathematics

Logic

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, J0044+0113, J0912+0029, J1032+5322, J1106+5228, J1143-0144, J1204+0358, J1213+6708, J1531-0105

Scientific paper

The SLACS collaboration measured the dark matter halos of elliptical galaxies on scales from 1 to 100 kpc, using a combination of lensing (strong and weak) and stellar dynamics. This provides new tests of the standard cosmological models at galaxy/group scales. However, lensing can only measure the total projected mass along the line of sight, and therefore can be affected by large-scale structures in projection. We propose to observe a complete subset of SLACS lenses to identify nearby groups and clusters, determine their location, temperature, and mass and study the dependency of halo profiles on the local environment, expected because of tidal interactions. The selected low redshift (average 0.13) lens sample is ideal for an X-ray investigation at galaxy/group scales.

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