The gas distribution in galaxy cluster outer regions
Abstract
Cluster outskirts are the regions where the transition between virialized cluster gas and accreting material from the large-scale structure occurs. I will present an analysis of a large sample of nearby clusters with ROSAT/PSPC, taking advantage of the large field-of-view of this instrument, to trace the behavior of the intracluster gas out to the virial radius. Detailed comparison between data and three different sets of numerical simulations will be shown. I will also present the mean azimuthal scatter profiles in our sample to quantify the deviations from the assumption of spherical symmetry. The implications of these results on our knowledge of the state of the gas in cluster outskirts (clumping, hydrostatic equilibrium) will be discussed.
- Publication:
-
Half a Century of X-ray Astronomy
- Pub Date:
- September 2012
- Bibcode:
- 2012hcxa.confE..56E