Dark matter annihilation and decay from non-spherical dark halos in the Galactic dwarf satellites

Understand

The dwarf spheroidal galaxies (dSphs) in the Milky Way are the primary targets in the indirect searches for particle dark matter.

• To set robust constraints on candidate of dark matter particles, understanding the dark halo structure of these systems is of substantial importance.
• In this paper, we first evaluate the astrophysical factors for dark matter annihilation and decay for 24 dSphs, with taking into account a non-spherical dark halo, using generalized axisymmetric mass models based on axisymmetric Jeans equations.
• First, from a fitting analysis of the most recent kinematic data available, our axisymmetric mass models are a much better fit than previous spherical ones, thus, our work should be the most realistic and reliable estimator for astrophysical factors.