XMM-Newton Observes Cl J0152.7-1357: A Massive Galaxy Cluster Forming at Merger Crossroads at z=0.83
Abstract
We present an analysis of a 50 ks XMM-Newton observation of the merging galaxy cluster Cl J0152.7-1357 at z=0.83. In addition to the two main subclusters and an infalling group detected in an earlier Chandra observation of the system, XMM-Newton detects another group of galaxies possibly associated with the cluster. This group may be connected to the northern subcluster by a filament of cool (1.4+0.3-0.1 keV) X-ray-emitting gas and lies outside the estimated virial radius of the northern subcluster. The X-ray morphology agrees well with the projected galaxy distribution in new K-band imaging data presented herein. We use detailed spectral and imaging analysis of the X-ray data to probe the dynamics of the system and find evidence that another subcluster or group has recently passed through the northern subcluster. Cl J0152.7-1357 is an extremely dynamically active system, with mergers at different stages occurring along two perpendicular merger axes.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 2006
- DOI:
- 10.1086/499939
- arXiv:
- arXiv:astro-ph/0511466
- Bibcode:
- 2006ApJ...640..219M
- Keywords:
-
- Cosmology: Observations;
- Galaxies: Clusters: General;
- Galaxies: Clusters: Individual: Alphanumeric: Cl J0152.7-1357;
- Galaxies: High-Redshift;
- Galaxies: Intergalactic Medium;
- X-Rays: Galaxies;
- Astrophysics
- E-Print:
- 10 pages, 10 figures, accepted for publication in ApJ