GAMMA-RAY OBSERVATIONS OF THE SUPERNOVA REMNANT RX J0852.0-4622 WITH THE FERMI LARGE AREA TELESCOPE

Tanaka T, Allafort A, Ballet J, Funk S, Giordano F, Hewitt J, Lemoine-Goumard M, Tajima H, Tibolla O, Uchiyama Y (2011)


Publication Type: Journal article

Publication year: 2011

Journal

Book Volume: 740

Journal Issue: 2

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

Abstract

We report on gamma-ray observations of the supernova remnant (SNR) RX J0852.0-4622 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 Gamma = 1.85 +/- 0.06 (stat)(-0.19)(+0.18) (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.

Authors with CRIS profile

Involved external institutions

How to cite

APA:

Tanaka, T., Allafort, A., Ballet, J., Funk, S., Giordano, F., Hewitt, J.,... Uchiyama, Y. (2011). GAMMA-RAY OBSERVATIONS OF THE SUPERNOVA REMNANT RX J0852.0-4622 WITH THE FERMI LARGE AREA TELESCOPE. Astrophysical Journal Letters, 740(2). https://doi.org/10.1088/2041-8205/740/2/L51

MLA:

Tanaka, T., et al. "GAMMA-RAY OBSERVATIONS OF THE SUPERNOVA REMNANT RX J0852.0-4622 WITH THE FERMI LARGE AREA TELESCOPE." Astrophysical Journal Letters 740.2 (2011).

BibTeX: Download