A test of galaxy cluster fundamental plane for the X-COP sample

S. Pradyumna; Shantanu Desai

doi:10.1088/1475-7516/2022/01/058

paper

A test of galaxy cluster fundamental plane for the X-COP sample

arXiv:2112.10478 · doi:10.1088/1475-7516/2022/01/058

Abstract

We test the galaxy cluster fundamental plane using the X-COP sample of 12 clusters. The fundamental plane is given by the relation $T_{X} \propto M_{s}^{α} r_{s}^{β}$ , where $T_{X}$ , $M_{s}$ , and $r_{s}$ correspond to the gas temperature, NFW halo mass, and scale radius, respectively. We did this analysis using two different temperatures: the error-weighted temperature in $(50 - 500) h^{- 1}$ kpc as well as the mass-weighted temperature in the same range. With both these temperatures, we find a very tight fundamental plane with dispersion of about 0.02 dex. The best-fit values for $α$ and $β$ are in-between those expected from virial equilibrium and self-similarity solution for secondary infall and collapse, with $α$ being closer to the virial expectation. Our best-fit values are also consistent with a recent re-analyses of the fundamental plane for the CLASH sample, after excluding the hottest clusters.

arXiv comment9 pages, 3 figures. Changed the radial range for calculating temperatures. Accepted for publication in JCAP

A test of galaxy cluster fundamental plane for the X-COP sample

Abstract

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