A test of Radial Acceleration Relation for the Giles et al Chandra cluster sample - INSPIRE

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A test of Radial Acceleration Relation for the Giles et al Chandra cluster sample

Jul 13, 2021

6 pages

Published in:

Phys.Dark Univ. 33 (2021) 100854

Published: Sep, 2021

e-Print:

2107.05845 [astro-ph.CO]

DOI:

10.1016/j.dark.2021.100854 (publication)

View in:

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Abstract: (Elsevier B.V.)

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. (2016). 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 1 0^{- 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 analysed cluster samples, which indicates that the acceleration scale found from the RAR could be of an emergent nature, instead of a fundamental universal scale.

Note:

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

Dark matter
Radial Acceleration Relation

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