کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1770796 | 1523383 | 2012 | 11 صفحه PDF | دانلود رایگان |
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 γ-ray studies of several of these, both young SNR and those interacting with molecular clouds.
► The Fermi gamma-ray space telescope large area telescope measures cosmic rays.
► The electron spectrum and anisotropy limits constrain models.
► Cosmic-ray sources may be more plentiful in the outer Galaxy than expected.
► Production of cosmic rays in supernova remnants is supported by Fermi LAT data.
Journal: Astroparticle Physics - Volumes 39–40, December 2012, Pages 22–32