Speaker
Mehrdad Phoroutan-Mehr
(University of California, Riverside (UCR))
Description
The existence of supermassive black holes at the center of galaxies redistributes the dark matter density profile in the region of influence and creates a higher density region so-called density spike. In the self-interaction dark matter scenario, the velocity dispersion in the spike region scales with a power law of r^−1/2, and the density spike scales with a power law of r^−(3+a)/4, where "a" is the parameter where the self-scattering scales with velocity. In this work, we calculate the J-factor and Q-factor for Sommerfeld-Enhanced s-wave and p-wave annihilation for the M87* galaxy and show that the p-wave annihilation flux can be enhanced and become at the same order as s-wave annihilation at higher dark matter masses.
Author
Mehrdad Phoroutan-Mehr
(University of California, Riverside (UCR))
