NASA Technical Reports Server (NTRS) : Fermi pdf

NASA Technical Reports Server (NTRS) : Fermi

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We report the detection of GeV gamma-ray emission from the supernova remnant Puppis A with the Fermi Gamma-Ray Space Telescope. Puppis A is among the faintest supernova remnants yet detected at GeV energies, with a luminosity of only 2.7×10(exp 34) (D/2.2 kpc)(exp 2) erg s(exp -1) between 1 and 100 GeV. The gamma-ray emission from the remnant is spatially extended, with a morphology matching that of the radio and X-ray emission, and is well described by a simple power law with an index of 2.1. We attempt to model the broadband spectral energy distribution, from radio to gamma-rays, using standard nonthermal emission mechanisms. To constrain the relativistic electron population we use 7 years of WMAP data to extend the radio spectrum up to 93 GHz. Both leptonic and hadronic dominated models can reproduce the nonthermal spectral energy distribution, requiring a total content of cosmic ray (CR) electrons and protons accelerated in Puppis A of at least WCR is approx.

(1 – 5)×10 (exp 49) erg

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 10/16/2012
• Year: 2012
• Book Topics/Themes: NASA Technical Reports Server (NTRS), FERMI GAMMA-RAY SPACE TELESCOPE, SUPERNOVA REMNANTS, LUMINOSITY, COSMIC RAYS, SPECTRAL ENERGY DISTRIBUTION, NONTHERMAL RADIATION, GAMMA RAY SPECTRA, RELATIVISTIC PARTICLES, PROTONS, COMPTON EFFECT, BREMSSTRAHLUNG, HADRONS, Hewitt, John William, Grondin, M. H., Lemoine-Goumard, M., Reposeur, T., Ballet, J., Tanaka, T

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