Scaling relations for dark matter core density and radius from Chandra X-ray cluster sample

K., Gopika and Desai, Shantanu (2020) Scaling relations for dark matter core density and radius from Chandra X-ray cluster sample. Physics of the Dark Universe, 30 (100707). ISSN 22126864

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Abstract

A large number of studies have found that the dark matter surface density, given by the product of the dark matter core radius (rc) and core density (ρc) is approximately constant for a wide range of galaxy systems. However, there has been only one systematic study of this ansatz for galaxy clusters by Chan et al. (2015), who found that the surface density for clusters is not constant and ρc∼rc−1.46. We carry out this test for an X-ray sample of 12 relaxed clusters from Chandra observations, studied by Vikhlinin et al. (2006), implementing the same procedure as in Ref. Chan et al. (2015), but also accounting for the gas and star mass. We find that ρc∝rc−1.08±0.055, with an intrinsic scatter of about 18%. Therefore, the dark matter surface density for our cluster data shows deviations from a constant value at only about 1.4σ.

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IITH Creators:
IITH CreatorsORCiD
Desai, Shantanuhttp://orcid.org/0000-0002-0466-3288
Item Type: Article
Uncontrolled Keywords: Dark Matter, Dwarf Galaxies, Tully-Fisher Relation
Subjects: Physics
Physics > Astronomy Astrophysics
Divisions: Department of Physics
Depositing User: . LibTrainee 2021
Date Deposited: 31 May 2021 06:38
Last Modified: 31 May 2021 06:38
URI: http://raiith.iith.ac.in/id/eprint/7889
Publisher URL: http://doi.org/10.1016/j.dark.2020.100707
OA policy: https://v2.sherpa.ac.uk/id/publication/24554
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