A VERY DEEP CHANDRA OBSERVATION OF A2052: BUBBLES, SHOCKS, AND SLOSHING

作者：Blanton E L^*; Randall S W; Clarke T E; Sarazin C L; McNamara B R; Douglass E M; McDonald M

来源：Astrophysical Journal, 2011, 737(2): 99.

DOI：10.1088/0004-637X/737/2/99

• galaxies: active
• galaxies: clusters: general
• galaxies: clusters: individual (A2052)
• galaxies: clusters: intracluster medium
• radio continuum: galaxies
• X-rays: galaxies: clusters

We present the first results from a very deep (similar to 650 ks) Chandra X-ray observation of A2052, as well as archival Very Large Array radio observations. The data reveal detailed structure in the inner parts of the cluster, including bubbles evacuated by radio lobes of the active galactic nucleus (AGN), compressed bubble rims, filaments, and loops. Two concentric shocks are seen, and a temperature rise is measured for the innermost one. On larger scales, we report the first detection of an excess surface brightness spiral feature. The spiral has cooler temperatures, lower entropies, and higher abundances than its surroundings, and is likely the result of sloshing gas initiated by a previous cluster-cluster or sub-cluster merger. Initial evidence for previously unseen bubbles at larger radii related to earlier outbursts from the AGN is presented.

• 出版日期2011-8-20