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 $N_{\mathrm{H}}$ 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.

23 pages, 28 figures, ApJ, in press

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• Interstellar protons in the TeV gamma-ray SNR HESS J1731-347:Possible evidence for the coexistence of hadronic and leptonic gamma-rays
• A non-pulsating neutron star in the supernova remnant HESS J1731-347 / G353.6-0.7 with a carbon atmosphere
• A young SNR illuminating nearby Molecular Clouds with cosmic rays
• Probing The Local Environment of the Supernova Remnant HESS J1731-347 with CO and CS Observations
• Prospects for CTA observations of the young SNR RX J1713.7-3946
• Fermi Large Area Telescope observations of the supernova remnant HESS J1731-347
• Evidence for a binary origin of a central compact object
• Detection of GeV $\gamma$-ray emission in the direction of HESS J1731-347 with Fermi-LAT
• Discovery of X-ray Emission from the Galactic Supernova Remnant G32.8-0.1 with Suzaku
• A GeV source in the direction of Supernova Remnant CTB 37B
• XMM-Newton observations of the non-thermal supernova remnant HESS J1731-347 (G353.6-0.7)
• A Systematic Study of the Thermal and Nonthermal Emission in the Supernova Remnant RCW 86 with Suzaku
• 325 and 610 MHz Radio Counterparts of SNR G353.6$-$0.7 a.k.a. HESS J1731$-$347
• The structure of TeV-bright shell-type supernova remnants
• Is the SNR HESS J1731-347 colliding with molecular clouds?
• Nonthermal processes and particle acceleration in supernova remnants