Dark Matter Annihilation in the Circumgalactic Medium at High Redshifts

Understand

Annihilating dark matter (DM) models offer promising avenues for future DM detection, in particular via modification of astrophysical signals.

• However when modelling such potential signals at high redshift the emergence of both dark matter and baryonic structure, as well as the complexities of the energy transfer process, need to be taken into account.
• In the following paper we present a detailed energy deposition code and use this to examine the energy transfer efficiency of annihilating dark matter at high redshift, including the effects on baryonic structure.
• We employ the PYTHIA code to model neutralino-like DM candidates and their subsequent annihilation products for a range of masses and annihilation channels.