Jan 25, 2018

Tom Jones , University of Minnesota , School of Physics and Astronomy

""Probing Galaxy Cluster Formation Through Dynamics of the Hot, Intracluster Medium (ICM)""

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Galaxy clusters, made mostly of dark matter, are the most massive and last structures to form out of cosmic expansion. They grow on timescales of Gyr through accretion and mergers. They are also frequently harassed by adjacent, smaller clumps of dark matter. As a result of this complex evolution cluster dynamical states are also complex.The hot ICM plasma is the dominant baryonic cluster component. Because the ICM is weakly collisional it effectively captures important details of the formation dynamics and its history. While some events and processes are revealed conveniently through thermal X-ray emissions, other vital dynamical behaviors are highlighted primarily via non-thermal emissions, either within the ICM itself or through interactions between the ICM and relativistic plasmas deposited within by active galaxies. This non-thermal window into cluster formation dynamics is especially important in cluster outskirts, where thermal X-ray signals are weak. In this talk I will review these issues and some of our ongoing efforts to model and decipher distinctive non-thermal signals of ICM dynamics.

Event Details

Date:
Jan 25, 2018

Time:
3:30–5pm

Location:
4421 Sterling Hall

Notes:
Coffee served at 3:30pm; talk starts at 3:45pm

Speaker Host:
Astronomy Dept

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