Schedule Mar 18, 2011
SZ Observations of Galaxy Clusters with MUSTANG
Tony Mroczkowski (UPenn)

I present recent high angular resolution (9") Sunyaev-Zel'dovich effect (SZE) observations with MUSTANG, a 90-GHz bolometric receiver on the 100 meter Green Bank Telescope. MUSTANG has now imaged several massive clusters of galaxies in some of the highest-resolution SZE imaging to date, revealing complex pressure substructure within the hot intra-cluster gas in merging clusters. Here I focus on two merging, intermediate redshift clusters: MACS J0744.8+3927 and MACS J0717.5+3745. In MACS J0744.8+3927, the MUSTANG observation revealed shock-heated gas previously undetected in X-ray (or any) observations, while preliminary observations of MACS J0717.5+3745 confirm the suspected shock found in X-ray and radio observations. Finally, I discuss prospects for MUSTANG2, the proposed successor to MUSTANG with over two orders of magnitude faster mapping speed.

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