Towards an improved model of self-interacting dark matter haloes

Abstract

In this work, we discuss the relation between the strength of the self-interaction of dark matter particles and the predicted properties of the inner density distributions of dark matter haloes. We present the results of $N$-body simulations for 28 haloes performed with the same initial conditions for cold dark matter and for self-interacting dark matter, for a range of cross-sections. We provide a simple phenomenological description of these results and compare with the semi-analytical model typically used in the literature. Using these results, we then predict how the inner dark matter surface density and core radius should depend on the self-interaction cross-section for observed haloes.

Corresponds to published version

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Cited by in corpus (22)

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• Direct detection and complementary constraints for sub-GeV dark matter
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• An Extra-Dimensional Model of Dark Matter
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• Cross Section Calculations in Theories of Self-Interacting Dark Matter
• Super Interacting Dark Sector: An Improvement on Self-Interacting Dark Matter via Scaling Relations of Galaxy Clusters