Abstract

Supernova Remnants (SNRs) are a very well studied class of objects in our Galaxy and are closely related to the origin of Cosmic Rays (CRs), being candidates to host the acceleration process of Galactic CRs. Accelerated particles in SNRs can produce γ-rays through interactions with gas (nucleon-nucleon interactions or e± bremsstrahlung) or low-energy photons (inverse Compton scattering by electrons). In more than eight years of data taking, the Large Area Telescope (LAT) onboard the Fermi satellite, has detected more than 30 SNRs in the γ-ray energy band. The energy range in which Fermi-LAT is sensitive, namely from less than 100 MeV up to a few hundred GeV, is crucial to provide information on the physical processes occurring at the source and disentangle between lepton-based and hadron-based interpretation models. The Fermi-LAT collaboration has recently performed a systematic study of the known SNRs, producing the first Supernova Remnant Catalog in the GeV energy range. The spatial and spectral information obtained allow a systematic study of the SNR characteristics, which, together with multi-wavelength information, provide more general constraints on the CR population of our Galaxy. We present here the latest results from the observations of Galactic SNRs by Fermi-LAT, with a particular focus on the recent results obtained in the first SNR catalog.

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