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

Abstract

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.

20 pages, 12 figures, to be published in Astroparticle Physics

References in corpus (17)

• Observation of an anomalous positron abundance in the cosmic radiation
• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• The cosmic-ray electron flux measured by the PAMELA experiment between 1 and 625 GeV
• Primary particle acceleration above 100 TeV in the shell-type Supernova Remnant RX J1713.7-3946 with deep H.E.S.S. observations
• The origin of the positron excess in cosmic rays
• Teraelectronvolt Astronomy
• On possible interpretations of the high energy electron-positron spectrum measured by the Fermi Large Area Telescope
• Observations of the young supernova remnant RX J1713.7-3946 with the Fermi Large Area Telescope
• Observational constraints on energetic particle diffusion in young SNRs: amplified magnetic field and maximum energy
• Gamma-Ray Emission Concurrent with the Nova in the Symbiotic Binary V407 Cygni
• Diffusive propagation of cosmic rays from supernova remnants in the Galaxy. II: anisotropy
• Discovery of TeV Gamma Ray Emission from Tycho's Supernova Remnant
• Fermi-LAT Detection of the Young SuperNova Remnant Tycho
• Fast Variability of Nonthermal X-Ray Emission in Cassiopeia A: Probing Electron Acceleration in Reverse-Shocked Ejecta
• Fermi-LAT Search for Pulsar Wind Nebulae around gamma-ray Pulsars
• Fermi Large Area Telescope Observations of the Supernova Remnant G8.7-0.1
• A Galactic Cosmic-Ray Database

Cited by in corpus (13)

• Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
• Learning About the Magnetar Swift J1834.9-0846 from its Wind Nebula
• High-energy gamma-ray study of the dynamically young SNR G150.3+4.5
• Exploring A Cosmic-Ray Origin of the Multi-wavelength Emission in M31
• Recent results in nuclear astrophysics
• The high-energy gamma-ray detection of G73.9+0.9, a supernova remnant interacting with a molecular cloud
• Fermi LAT Discovery of Extended Gamma-Ray Emissions in the Vicinity of the HB3 Supernova Remnant
• Fermi Large Area Telescope Observations of the Monoceros Loop Supernova Remnant
• The radial gradient of cosmic ray intensity in the Galaxy
• FERMI-LAT Observations of Supernova Remnant G5.7-0.1, Believed to be Interacting with Molecular Clouds
• Detection of the extended $\gamma$-ray emission from the new supernova remnant G321.3-3.9 with Fermi-LAT
• The Gamma-ray Sky with Fermi
• Multiwavelength study of non-thermal emission in the Swift J1834.9-0846/W41 region