Perseus cluster in its X-ray entirety with SRG/eROSITA. Merger and Radio-Uroboroses
Eugene Churazov, Ildar Khabibullin, Natalya Lyskova, Rashid Sunyaev, Klaus Dolag

TL;DR
This study provides a comprehensive X-ray analysis of the Perseus galaxy cluster, revealing merger dynamics, AGN feedback, and peculiar radio galaxy features through combined data from SRG/eROSITA, XMM-Newton, and Chandra.
Contribution
It offers the first complete X-ray coverage of Perseus up to and beyond R200c, highlighting merger history and radio galaxy morphology in a unified analysis.
Findings
Perseus exhibits a cool-core structure with signs of AGN feedback.
IC310 is identified as the main galaxy of a merging subcluster over 4 Gyr.
Radio galaxy NGC1265 shows a rare line-of-sight motion with distinctive radio tails.
Abstract
The Perseus cluster (Abell 426) is a nearby massive galaxy cluster that spans several degrees. We combined SRG/eROSITA, XMM-Newton, and Chandra data to get a complete coverage of this cluster in X-rays up to and beyond, although at the largest radii, spatial non-uniformities of the X-ray sky background and foreground dominate. While the Perseus central part represents a canonical cool-core structure with clear signs of AGN Feedback, the outskirts, in turn, serve as a convincing example of a merger-perturbed system. X-ray data suggest that IC310 is the main galaxy of a subcluster that merges with Perseus over the past . Overall, this configuration resembles the merger between the Coma cluster and the NGC4839 group. It is statistically more likely to find a merging group near the apocenter of its orbit. Therefore, it is not surprising that IC310 in…
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