A tight scaling relation of dark matter in galaxy clusters

Abstract

Recent studies in different types of galaxies reveal that the product of the central density and the core radius (${\rho }_c{r}_c$) is a constant. However, some empirical studies involving galaxy clusters suggest that the product ${\rho }_c{r}_c$ depends weakly on the total dark halo mass. In this article, we re-analyse the hot gas data from 106 clusters and obtain a surprisingly tight scaling relation: ${\rho }_c\propto r_c^{-1.46\pm 0.16}$. This result generally agrees with the claims that ${\rho }_c{r}_c$ is not a constant for all scales of structure. Moreover, this relation does not support the velocity-dependent cross section of dark matter if the core formation is due to the self-interaction of dark matter.

Accepted by MNRAS Letters

References in corpus (5)

• Cores in Dwarf Galaxies from Dark Matter with a Yukawa Potential
• Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters
• GHASP : an H alpha kinematic survey of spiral and irregular galaxies. V. Dark matter distribution in 36 nearby spiral galaxies
• Separating baryons and dark matter in cluster cores: a full 2-D lensing and dynamic analysis of Abell 383 and MS2137-23
• New evidence for dark matter

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• A test of invariance of dark matter halo surface density using multiwavelength mock galaxy catalogues
• A test of linearity of the ratio of dark matter to baryonic matter in galaxy clusters
• A test of galaxy cluster fundamental plane for the X-COP sample
• Two analytic relations connecting the hot gas astrophysics with the cold dark matter model for galaxy clusters
• A test of invariance of halo surface density for FIRE-2 simulations with cold dark matter and self-interacting dark matter
• A test of MOND and Emergent Gravity with SMACS J0723.3-7327 using eROSITA observations