Suzaku Observations of the Non-thermal Supernova Remnant HESS J1731-347

Abstract : A detailed analysis of the nonthermal X-ray emission from the North-Western and Southern parts of the supernova remnant (SNR) HESS J1731$-$347 with {\it Suzaku} is presented. The shell portions covered by the observations emit hard and line-less X-rays. The spectrum can be reproduced by a simple absorbed power-law model with a photon index $\Gamma$ of 1.8-2.7 and an absorption column density $N_{\rm H}$ of (1.0-2.1)$\times 10^{22}$ cm$^{-2}$. These quantities change significantly from region to region; the North-Western part of the SNR has the hardest and most absorbed spectrum. The Western part of the X-ray shell has a smaller curvature than North-Western and Southern shell segments. A comparison of the X-ray morphology to the Very High Energy (VHE) gamma-ray and radio images was performed. The efficiency of electron acceleration and emission mechanism in each portion of the shell are discussed. Thermal X-ray emission from the SNR was searched for but could not be detected at a significant level.
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Contributor : Claudine Bombar <>
Submitted on : Tuesday, November 6, 2012 - 4:35:32 PM
Last modification on : Friday, November 6, 2020 - 3:29:46 AM

Citation

A. Bamba, G. Pühlhofer, Fabio Acero, D. Klochkov, W. Tian, et al.. Suzaku Observations of the Non-thermal Supernova Remnant HESS J1731-347. The Astrophysical Journal, American Astronomical Society, 2012, 756, pp.149. ⟨10.1088/0004-637X/756/2/149⟩. ⟨in2p3-00749114⟩

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