Speaker
Dr
Ilias Cholis
(SISSA)
Description
Recently using the gamma-ray data from Fermi-LAT, a diffuse component emission has been
revealed towards the galactic center, and extending up to 50 degrees in latitude.
This component that has been denoted as the Fermmi haze, is generated via inverse Compton scattering
by the same electrons that due to synchrotron radiation are responsible for the WMAP haze.
The Fermi haze having an elongated in latitude morphology and a significantly harder spectrum
compared to any other region in the sky suggests a population of electrons not accounted for by conventional astrophysical sources.
Anisotropic diffusion along ordered B-field lines towards the inner region of the Galaxy coupled with a prolate Dark halo can yield the required morphology in the case of annihilating Dark Matter,
while still making reasonable assumptions about the necessary B-field profile.
Moreover the Dark Matter models assumed can simultaneously explain the WMAP haze and local CR excesses in electrons and positrons.
Primary authors
Dr
Greg Dobler
(KITP/UCSB)
Dr
Ilias Cholis
(SISSA)
Co-author
Prof.
Neal Weiner
(NYU/IAS)
