Speaker
Dr
Alfredo Urbano
(SISSA)
Description
The quest for Dark Matter signals in the gamma-ray sky is one of the most intriguing and exciting challenges in astrophysics. In this talk I will discuss the energy spectrum of the Fermi bubbles at different latitudes, making use of the gamma-ray data collected by the Fermi Large Area Telescope. At high latitude, $|b|=20^{\circ}-50^{\circ}$, the Fermi bubbles energy spectrum can be reproduced by gamma-ray photons generated by inverse Compton scattering processes, assuming the existence of a population of high-energy electrons. At low latitude, $|b|=10^{\circ}-20^{\circ}$, the presence of a bump at $E_{\gamma}\sim 1-4$ GeV, reveals the existence of an extra component compatible with Dark Matter annihilation.
Author
Dr
Alfredo Urbano
(SISSA)
Co-authors
Dr
Wei Xue
(SISSA)
Dr
Wei-Chih Huang
(UCL)
