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Cosmic ray studies with the Fermi Gamma-ray Space Telescope Large Area Telescope

2011; Elsevier BV; Volume: 39-40; Linguagem: Inglês

10.1016/j.astropartphys.2011.10.009

1873-2852

D. J. Thompson, L. Baldini, Y. Uchiyama,

Neutrino Physics Research

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.