The merging cluster Abell 85 caught between meals by XMM-Newton
Abstract
Our XMM-Newton observations of Abell 85 confirm the extended 4 Mpc filament first detected with ROSAT, which has an X-ray temperature of about ∼2 keV and is probably made of groups falling on to the cluster. A comparison of the temperature map with numerical simulations show that Abell 85 had intense merging activity in the past and is not fully relaxed, even in the central region. Finally, a deprojected temperature profile has been calculated and used, together with the surface brightness, to estimate the entropy and pressure profiles. Abell 85 only presents a mild flattening of the entropy profile in the center, showing no evidence of an "entropy floor".
- Publication:
-
Advances in Space Research
- Pub Date:
- 2005
- DOI:
- 10.1016/j.asr.2005.01.035
- arXiv:
- arXiv:astro-ph/0501214
- Bibcode:
- 2005AdSpR..36..618D
- Keywords:
-
- Astrophysics
- E-Print:
- Contribution to the Proceedings of the COSPAR Scientific Assembly, E1.2 "Clusters of Galaxies: New Insights from XMM-Newton, Chandra and INTEGRAL", Paris (France), July 19-20, 2004, accepted for publication in Advances in Space Research
