Gas sloshing regulates and records the evolution of the Fornax Cluster
Yuanyuan Su (1), Paul E. J. Nulsen (1), Ralph P. Kraft (1), Elke, Roediger (2), John A. ZuHone (1), Christine Jones (1), William R. Forman (1),, Alex Sheardown (2), Jimmy A. Irwin (3), Scott W. Randall (1) ((1), Harvard-Smithsonian Center for Astrophysics, (2) University of Hull

TL;DR
This study analyzes X-ray data of the Fornax Cluster to reveal gas sloshing features, cold fronts, and their role in cluster evolution and core heating, highlighting the impact of galaxy infall on intracluster medium dynamics.
Contribution
It provides the first detailed identification of multiple gas sloshing cold fronts in the Fornax Cluster and links their formation to galaxy infall events, offering insights into cluster evolution.
Findings
Four cold fronts identified at various radii.
Gas sloshing influences metal redistribution in the cluster.
Sloshing may contribute to cool core heating.
Abstract
We present results of a joint {\sl Chandra} and {\sl XMM-Newton} analysis of the Fornax Cluster, the nearest galaxy cluster in the southern sky. Signatures of merger-induced gas sloshing can be seen in the X-ray image. We identify four sloshing cold fronts in the intracluster medium, residing at radii of 3\,kpc (west), 10\,kpc (northeast), 30\,kpc (southwest) and 200\,kpc (east). Despite spanning over two orders of magnitude in radius, all four cold fronts fall onto the same spiral pattern that wraps around the BCG NGC~1399, likely all initiated by the infall of NGC~1404. The most evident front is to the northeast, 10\,kpc from the cluster center, which separates low-entropy high-metallicity gas and high-entropy low-metallicity gas. The metallicity map suggests that gas sloshing, rather than an AGN outburst, is the driving force behind the redistribution of the enriched gas in this…
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