The Effective J-Factor of the Galactic Center for Velocity-Dependent Dark Matter Annihilation

Understand

We present the effective $J$-factors for the Milky Way for scenarios in which dark matter annihilation is p-wave or d-wave suppressed.

• We find that the velocity suppression of dark matter annihilation can have a sizable effect on the morphology of a potential dark matter annihilation signal in the Galactic Center.
• The gamma-ray flux from the innermost region of the Galactic Center is in particular suppressed.
• We find that for dark matter density profiles with steep inner slopes, the morphology of the Inner Galaxy gamma-ray emission in p-wave models can be made similar to the morphology in standard s-wave models.