Mathematics – Logic
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543620h&link_type=abstract
American Astronomical Society, AAS Meeting #215, #436.20; Bulletin of the American Astronomical Society, Vol. 42, p.387
Mathematics
Logic
Scientific paper
In the Chandra era, a number of galaxy clusters have been identified as hosting so-called "cold fronts", sharp edges in the X-ray surface brightness and spectral temperature. In contrast to observed shocks in the ICM of galaxy clusters, these features are seen to be pressure continuous, with the inferred density and temperature jumps in opposite directions. A number of physical scenarios have been postulated to explain these features, including subcluster mergers that strip gas out of dark matter potential wells and expand adiabatically, to "sloshing" of the central cold gas in cool core galaxy clusters in response to smaller perturbations. We examine the statistical properties of cold fronts in synthetic X-ray images generated from a large (512h-1 Mpc)3 volume simulated with the Enzo adaptive mesh refinement hydro/N-body cosmological code. We explore the correlation of the appearance of cold fronts and the merger state and history of simulated clusters with a variety of baryonic physics included. We determine the origin of the merger type cold fronts in clusters. In addition we describe the statistical properties of the cold fronts throughout the simulated cluster sample.
Burns Jason
Hallman Eric J.
Norman Michael
O'Shea Brian
Skillman S.
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