Fitting a self-interacting dark matter model to data ranging from satellite galaxies to galaxy clusters

Abstract

We present a fit to observational data in an asymmetric self-interacting dark matter model using our recently calculated cross sections that incorporate both $t$-channel and $u$-channel exchanges in the scattering of identical particles. We find good fits to the data ranging from dwarf galaxies to galaxy clusters and equivalent relative velocities from $\ensuremath{\sim}20\text{ }\text{ }\mathrm{km}/\mathrm{s}$ to $\ensuremath{\gtrsim}1{0}^{3}\text{ }\text{ }\mathrm{km}/\mathrm{s}$. We compare our results with previous fits that used only $t$-channel exchange contributions to the scattering.

Topics & Concepts