Self-interacting dark matter from simulations and astrophysics

by Sambo Sarkar

Thursday 13 Feb 2025, 14:00 → 16:00 Asia/Seoul

B447-1 (IBS-CTPU-CGA)

In an era characterized by a wide range of astrophysical and cosmological observations, the synergy of data with sophisticated simulations has enabled us to probe interesting phenomenological paradigms of particulate dark matter (DM). Self-scattering of particulate DM within the dark sector can contribute to the thermalization of the central region of a galactic halo. The self-interaction strength of DM has a significant impact on the position and velocities of DM within these thermalised regions.  We conduct rigorous DM only N-body simulations of spherical isolated haloes of (10^10-10^15) M⊙ and study their matter and velocity distributions. We also report conservative bounds on the self-interaction cross-section, constraining velocity and matter distribution models.