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Astrophysical Tests of Dark Matter Self-Interactions
Susmita Adhikari, Arka Banerjee, Kimberly K. Boddy +11
Self-interacting dark matter (SIDM) arises generically in scenarios for physics beyond the Standard Model that have dark sectors with light mediators or strong dynamics. The self-i…
A semi-analytic study of self-interacting dark-matter haloes with baryons
Fangzhou Jiang, Andrew Benson, Philip F. Hopkins +8
We combine the isothermal Jeans model and the model of adiabatic halo contraction into a simple semi-analytic procedure for computing the density profile of self-interacting dark-m…
Comparing Implementations of Self-Interacting Dark Matter in the Gizmo and Arepo Codes
Helen Meskhidze, Francisco J. Mercado, Omid Sameie +4
Self-interacting dark matter (SIDM) models have received great attention over the past decade as solutions to the small-scale puzzles of astrophysics. Though there are different im…
Universal gravothermal evolution of isolated self-interacting dark matter halos for velocity-dependent cross sections
Nadav Joseph Outmezguine, Kimberly K. Boddy, Sophia Gad-Nasr +2
We study the evolution of isolated self-interacting dark matter (SIDM) halos using spherically-symmetric gravothermal equations allowing for the scattering cross section to be velo…
The Odd Dark Matter Halos of Isolated Gas-rich Ultradiffuse Galaxies
Demao Kong, Manoj Kaplinghat, Hai-Bo Yu +2
We analyze circular velocity profiles of seven ultradiffuse galaxies (UDGs) that are isolated and gas-rich. Assuming that the dark matter halos of these UDGs have a Navarro-Frenk-W…
Motivations for a Large Self-Interacting Dark Matter Cross Section from Milky Way Satellites
Maya Silverman, James S. Bullock, Manoj Kaplinghat +2
We explore the properties of Milky Way subhalos in self-interacting dark matter models for moderate cross sections of 1 to 5 cmg using high-resolution zoom-in N-body sim…