FERMI-LAT and WMAP Observations of the PUPPIS a Supernova Remnant
Document Type
Article
Publication Date
10-22-2012
Abstract
We report the detection of GeV γ-ray emission from the supernova remnant (SNR) Puppis A with the Fermi Gamma-Ray Space Telescope. Puppis A is among the faintest SNRs yet detected at GeV energies, with a luminosity of only 2.7 × 1034 (D/2.2 kpc)2 erg s−1 between 1 and 100 GeV. The γ-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 (SED), from radio to γ-rays, using standard nonthermal emission mechanisms. To constrain the relativistic electron population we use 7 years of Wilkinson Microwave Anisotropy Probe data to extend the radio spectrum up to 93 GHz. Both leptonic- and hadronic-dominated models can reproduce the nonthermal SED, requiring a total content of cosmic-ray electrons and protons accelerated in Puppis A of at least WCR ≈ (1–5) × 1049 erg.
Publication Title
The Astrophysical Journal
Volume
759
Issue
2
Digital Object Identifier (DOI)
10.1088/0004-637X/759/2/89
Citation Information
HEWITT, J. W., GRONDIN, M.-H., LEMOINE-GOUMARD, M., REPOSEUR, T., BALLET, J., & TANAKA, T. (2012). FERMI-LAT AND WMAP OBSERVATIONS OF THE PUPPIS A SUPERNOVA REMNANT. The Astrophysical Journal, 759(2), 89. https://doi.org/10.1088/0004-637X/759/2/89