Investigating the Relationship Between the Hot Gas and the Dark Matter Components of Galaxy Clusters

Details Investigating the Relationship Between the Hot Gas and the Dark Matter Components of Galaxy Clusters Investigating the Relationship Between the Hot Gas and the Dark Matter Components of Galaxy Clusters

2007-08-21

arxiv.org/abs/0708.2797v1

Astronomy and Astrophysics

Astrophysics

2 pages, 2 figures, to be published in proceedings of IAUS 244 "Dark Galaxies and Lost Baryons"

Scientific paper

10.1017/S1743921307014342

Various differences in galaxy cluster properties derived from X-ray and weak lensing observations have been highlighted in the literature. One such difference is the observation of mass concentrations in lensing maps which have no X-ray counterparts (e.g. Jee, White, Ford et al. 2005). We investigate this issue by identifying substructures in maps of projected total mass (analogous to weak lensing mass reconstructions) and maps of projected X-ray surface brightness for three simulated clusters. We then compare the 2D mass substructures with both 3D subhalo data and the 2D X-ray substructures. Here we present preliminary results from the first comparison, where we have assessed the impact of projecting the data on subhalo identification.

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