Probes of Cluster Turbulence

Details Probes of Cluster Turbulence Probes of Cluster Turbulence

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011scgg.conf...40o&link_type=abstract

"Structure in Clusters and Groups of Galaxies in the Chandra Era, 2011 Chandra Science Workshop held July 12-14, 2011. Edited by

Astronomy and Astrophysics

Astronomy

Scientific paper

Volume-filling turbulence in clusters has important consequences for nonthermal pressure support, thermal conduction, metal and entropy transport. However, depending on the nature of the stirring process, bulk motions in the ICM could be patchy (e.g., confined to the wakes of galaxies and subhalos). We discuss quantitative constraints that Astro-H might be able to place. If turbulence is only partially volume filling, then a bimodal spectral structure could potentially be seen in Astro-H spectra. We run Markov Chain Monte Carlo simulations of gaussian mixture modeling to predict the accuracy with which multiple parameters like the turbulent linewidth, volume filling factor, and coherence scale of velocity field can be extracted from the data.

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