1201.0988 (David J. Thompson et al.)

Cosmic Ray Studies with the Fermi Gamma-ray Space Telescope Large Area Telescope    [PDF]

David J. Thompson, Luca Baldini, Yasunobu Uchiyama

The Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope provides both direct and indirect measurements of Galactic cosmic rays (CR). The LAT high-statistics observations of the 7 GeV - 1 TeV electron plus positron spectrum and limits on spatial anisotropy constrain models for this cosmic-ray component. On a Galactic scale, the LAT observations indicate that cosmic- ray sources may be more plentiful in the outer Galaxy than expected or that the scale height of the cosmic-ray diffusive halo is larger than conventional models. Production of cosmic rays in supernova remnants (SNR) is supported by the LAT gamma-ray studies of several of these, both young SNR and those interacting with molecular clouds.

View original: http://arxiv.org/abs/1201.0988