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

Pradyumna, S. and Desai, Shantanu (2022) A test of galaxy cluster fundamental plane for the X-COP sample. Journal of Cosmology and Astroparticle Physics, 2022 (01). ISSN 1475-7516

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Abstract

We test the galaxy cluster fundamental plane using the X-COP sample of 12 clusters. The fundamental plane is given by the relation TX Msα rsβ, where TX, Ms, and rs 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. © 2022 IOP Publishing Ltd and Sissa Medialab.

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