Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21712701j&link_type=abstract
American Astronomical Society, AAS Meeting #217, #127.01; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
Despite appearing relaxed and symmetric on large scales, many galaxy clusters exhibit striking asymmetries in their core gas distributions. One mechanism for creating these asymmetries is by the bulk oscillation, or sloshing, of the core gas about the cluster gravitational potential minimum. In X-ray observations, this sloshing gas appears as sharp edges in a cluster's surface brightness distribution, with the edges demarcating the (projected) boundary between the lowest entropy gas near the sloshing core and the higher entropy outer cluster gas. Simulations have demonstrated that this sloshing may be brought about by gravitational interactions with other groups or clusters and that such interactions need not be so energetic as mergers, but that even glancing interactions may initiate this gas sloshing. Since large clusters tend to lie at the intersection of cosmic filaments, where there are potentially many such interactions, we expect that most massive clusters should be undergoing some degree of gas sloshing as a result of previous interactions with infalling groups or clusters. My dissertation explores the nature of this core gas sloshing in clusters and how we may use this phenomena as a pointer to the merger history of the system.
Forman William
Johnson Ryan
Jones Christine
Markevitch Maxim
Wegner Gary
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