Speaker
Gabrijela Zaharijas
Description
We quantify the importance of the bremsstrahlung emission on the interstellar gas in computing indirect signatures of Dark Matter annihilation in the Galaxy, showing that it is the dominant component of the gamma-ray spectrum for some cases.
We also find that, in regions in which bremsstrahlung dominates energy losses, the related γ-ray emission is only moderately sensitive to possible large variations in the gas density. Still, we stress that, for computing precise spectra in the (sub-)GeV range, it is important to compute self-consistently the gamma emission and the solution to the diffusion-loss equation as well as to obtain a reliable description of the inner Galaxy gas distribution. For example, these are crucial issues to quantify and interpret meaningfully γ-ray map ‘residuals’ in terms of (light) DM annihilations.
