26 June 2011 to 1 July 2011
Montpellier, France
Europe/Paris timezone

Diffuse Galactic Gamma Rays at intermediate and high Latitudes, Constraints on ISM properties and DM

30 Jun 2011, 14:00
20m
Main amphitheater (Universe)

Main amphitheater

Universe

Speaker

Dr Ilias Cholis (SISSA Trieste)

Description

Recently published $\gamma$-ray spectral data from the Fermi Collaboration have provided the possibility to study the diffuse $\gamma$-ray sky at medium and high latitudes ($\mid b \mid > 10^{\circ}$) and energies of 1-100 GeV with unprecedented accuracy. This provides us the chance of probing and constraining models of annihilating and decaying Dark Matter, as well as studying and confirming conventional assumptions made on Interstellar Medium properties including gasses distributions, diffusion and propagation of cosmic rays. Implementing the publicly available DRAGON code, that has been shown to reproduce local measurements of cosmic rays, we can study assumptions made in the literature on galactic gas models, and on diffusion properties of cosmic rays, in order to confirm or exclude those that can (cannot) fit the observed $\gamma$-ray spectra. Also constraints are placed on a garden variety of Dark Matter models recently proposed to explain the local spectra of electrons, positrons and antiprotons, and $\gamma$-rays at the center of the Galaxy.

Presentation Materials