TANAKA, T.; ALLAFORT, A.; BALLET, Jean; FUNK, S.; GIORDANO, F.; HEWITT, J.; LEMOINE-GOUMARD, M.; TAJIMA, H.; TIBOLLA, O.; UCHIYAMA, Y.

doi:10.1088/2041-8205/740/2/L51

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TANAKA, T.

ALLAFORT, A.

BALLET, Jean
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]

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The Astrophysical journal letters. 2011-10-20, vol. 740, p. L51

Bristol : IOP Publishing

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We report on gamma-ray observations of the supernova remnant (SNR) RX J0852.0-4622 with the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope. In the Fermi LAT data, we find a spatially extended source at the location of the SNR. The extension is consistent with the SNR size seen in other wavelengths such as X-rays and TeV gamma rays, leading to the identification of the gamma-ray source with the SNR. The spectrum is well described as a power law with a photon index of Gamma = 1.85 +/- 0.06 (stat) (+0.18,-0.19) (sys), which smoothly connects to the H.E.S.S. spectrum in the TeV energy band. We discuss the gamma-ray emission mechanism based on multiwavelength data. The broadband data can be fit well by a model in which the gamma rays are of hadronic origin. We also consider a scenario with inverse Compton scattering of electrons as the emission mechanism of the gamma rays. Although the leptonic model predicts a harder spectrum in the Fermi LAT energy range, the model can fit the data considering the statistical and systematic errors.< Réduire

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Gamma-Ray Observations of the Supernova Remnant RX J0852.0-4622 with the Fermi LAT

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