| タイトル | Gamma-Ray Observations of the Supernova Remnant RX J0852.0-4622 with the Fermi Large Area Telescope |
| 著者（英） | Tibolla, O.; Tanaka, T.; Allafort, A.; Uchiyama, Y.; Giordano, F.; Ballet, J.; Funk, S.; Tajima, H.; Lemoine-Goumard, M.; Hewitt, J. |
| 発行日 | 2011-10-20 |
| 言語 | eng |
| 内容記述 | We report on gamma-ray observations of the supernova remnant (SNR) RX J0852.04622 with the Large Area Telescope (LAT) on board 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 = 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. |
| NASA分類 | Astrophysics |
| レポートNO | GSFC.ABS.5621.2011 |
| 権利 | Copyright |
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