13–16 mag 2009
Roma
Europe/Rome fuso orario

New measurement of the angular power spectrum of anisotropies in the data of Fermi-LAT

14 mag 2009, 18:30
25m
Sala Vittorio Emanuele (Villa Tuscolana)

Sala Vittorio Emanuele

Villa Tuscolana

DM

Relatore

Sig. Mattia Fornasa (School of Physics and Astronomy of the University of Nottingham)

Descrizione

The Diffuse Gamma-Ray Background (DGRB) collects the radiation produced by all those sources that are not bright enough to be resolved individually. Therefore, it represents an essential tool to study faint gamma-ray emitters, like star-forming or radio galaxies and the exotic Dark Matter. The anisotropy pattern of the DGRB is extremely informative: I will review the recent measurement of the anisotropy angular power spectrum performed by the Fermi LAT Collaboration with almost 80 months of data. This brand-new result can be used to infer the composition of the DGRB. In particular, I will show how it constrains the emission expected from Dark Matter.

Materiali di presentazione