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Astronomy Colloquium - "Galaxy clusters: laboratories for extreme plasma physics"

Event Type
Department of Astronomy
Astronomy 134
Mar 10, 2015   3:45 pm  
Brian O’Shea Department of Physics & Astronomy and Department of Computational Mathematics, Science, and Engineering Michigan State University
Originating Calendar
Astronomy Colloquium Speaker Calendar

Galaxy clusters are the most massive virialized objects in the universe, and have the potential to be highly accurate probes of cosmological parameters. A fundamental challenge for cluster cosmology is to estimate the masses of these objects using observational proxies such as X-ray luminosity and temperature, which are complicated by the merger history of clusters and the microphysical properties of the intracluster medium.  These effects, while frustrating to cosmologists, provide a rich laboratory for exploring the plasma physical processes that are occurring in these massive objects.  In this talk I will present recent efforts to understand the effects that several plasma processes - including conduction and AGN feedback - have on the observable properties of galaxy clusters. 

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