An XMM-Newton Study of the Core of the Antlia Cluster: Heating and Chemical Enrichment in a Galaxy Cluster without a Cool Core

Details An XMM-Newton Study of the Core of the Antlia Cluster: Heating and Chemical Enrichment in a Galaxy Cluster without a Cool Core An XMM-Newton Study of the Core of the Antlia Cluster: Heating and Chemical Enrichment in a Galaxy Cluster without a Cool Core

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.3903h&link_type=abstract

American Astronomical Society, HEAD meeting #12, #39.03

Astronomy and Astrophysics

Astronomy

Scientific paper

A fundamental question for models of structure formation is how energy and heavy elements are distributed throughout the intra-cluster medium (ICM) as the cluster evolves hierarchically by sub-cluster mergers along filaments in the cosmic web. The dominant dynamical processes -- hydrodynamic and tidal stripping, supernovae and stellar winds, bulk gas motions induced by mergers, and matter entrainment uplifted by AGN driven jets and buoyant bubbles -- create distinct X-ray signatures in surface brightness images and temperature and abundance maps of the cluster gas. The relative efficiencies of these processes during the early stages of cluster evolution are not well understood. We use a 53 ks XMM-Newton exposure of the inner 12 arcminutes of the Antlia cluster, the nearest example of a galaxy cluster in an intermediate merger stage without a cool core, to study energy and metal transport throughout the cluster gas. We construct density, temperature, pressure, entropy and abundance maps to identify gas motions and heat flows, relate these motions to the metal abundance ratios and gradients, and test simple models for chemical enrichment and heating of the Antlia cluster ICM.

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