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

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

Dec 20, 2021

9 pages

Published in:

JCAP 01 (2022) 01, 058,
JCAP 01 (2022) 058

Published: Jan 26, 2022

e-Print:

2112.10478 [astro-ph.CO]

DOI:

10.1088/1475-7516/2022/01/058

View in:

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Abstract: (IOP)

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}

∝ 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.

Note:

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

galaxy clusters
X-ray telescopes

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