2011/01/25 by Tony Mroczkowski, Mroczkowski, Tony, Mark J. Devlin +17
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astrophysics and Cosmic Phenomena #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Geophysics and Gravity Measurements
paper · pdf · doi:10.48550/arxiv.1101.4905
openalex publication_date 2011/01/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present recent high angular resolution (9") Sunyaev-Zel'dovich effect (SZE) observations with MUSTANG, a 90-GHz bolometric receiver on the 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. We focus on three merging, intermediate redshift clusters here: MACS J0744.8+3927, MACS J0717.5+3745, RX J1347.5-1145. In one of these merging clusters, MACS J0744.8+3927, the MUSTANG observation has revealed shocked gas that was previously undetected in X-ray observations. Our preliminary results for MACS J0717.5+3745 demonstrate the complementarity these observations provide when combined with X-ray observations of the thermal emission and radio observations of the non-thermal emission. And finally, by revisiting RX J1347.5-1145, we note an inter- esting correlation between its radio emission and the SZE data. While observations of the thermal SZE probe the line of sight integral of thermal electron pressure through a cluster, these redshift independent observations hold great potential for aiding the interpretation of non-thermal astrophysics in high-z clusters.