A test of Radial Acceleration Relation for the {\it Giles et al Chandra} cluster sample

Abstract

We carry out a test of the radial acceleration relation (RAR) for a sample of 10 dynamically relaxed and cool-core galaxy clusters imaged by the Chandra X-ray telescope, which was studied in Giles et al. For this sample, we observe that the best-fit RAR shows a very tight residual scatter equal to 0.09 dex. We obtain an acceleration scale of $1.59\times 10^{-9}m/s^2$, which is about an order of magnitude higher than that obtained for galaxies. Furthermore, the best-fit RAR parameters differ from those estimated from some of the previously analyzed cluster samples, which indicates that the acceleration scale found from the RAR could be of an emergent nature, instead of a fundamental universal scale.

6 pages, 2 figures. Accepted for publication in Phys. Dark Universe

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• Constraints on Self-Interacting dark matter from relaxed galaxy groups
• Testing the Collisionless Nature of Dark Matter with the Radial Acceleration Relation in Galaxy Clusters
• A test of linearity of the ratio of dark matter to baryonic matter in galaxy clusters
• A test of galaxy cluster fundamental plane for the X-COP sample
• A test of MOND and Emergent Gravity with SMACS J0723.3-7327 using eROSITA observations
• Examining Baryonic Faber-Jackson Relation in Galaxy Groups