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

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...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2022-01, Vol.2022 (1), p.58
Main Authors: Pradyumna, S., Desai, Shantanu
Format: Article
Language:English
Subjects:
Clusters
Galaxies
galaxy clusters
Gas temperature
Self-similarity
Similarity solutions
Temperature
X-ray telescopes
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Summary: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.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2022/01/058