Boosting the annihilation boost: Tidal effects on dark matter subhalos and consistent luminosity modeling

Understand

In the cold dark matter paradigm, structures form hierarchically, implying that large structures contain smaller substructures.

• These subhalos will enhance signatures of dark matter annihilation such as gamma rays.
• In the literature, typical estimates of this boost factor assume a concentration-mass relation for field halos, to calculate the luminosity of subhalos.
• However, since subhalos accreted in the gravitational potential of their host loose mass through tidal stripping and dynamical friction, they have a quite characteristic density profile, different from that of the field halos of the same mass.