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Hadronic Interpretation of High-Energy Gamma-Rays from Two TeV Sources Coincident with Molecular Clouds Overtaken by Supernova Remnants |
| FANG Jun, ZHANG Li |
| Department of Physics, Yunnan University, Kunming 650091 |
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| Cite this article: |
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FANG Jun, ZHANG Li 2008 Chin. Phys. Lett. 25 4486-4489 |
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Abstract We present a possible hadronic explanation of the high-energy γ-ray emission from two very high-energy (VHE) sources, HESS J1745--303 (A) and HESS J1714-385, which coincide with supernova remnants (SNRs) interacting with dense molecular clouds (MCs). We calculate the proton spectra and the corresponding hadronic γ-ray spectra for different Mach numbers of the shock wave in a semi-analytical model for the non-linear shock acceleration process, then apply the model to the two newly discovered TeV sources. The results show that the γ-ray spectra for the two sources with energies above 100MeV detected by HESS and EGRET can be reproduced with low Mach numbers about 2.5. Thus the high-energy γ-ray origin for each one of the two sources can be interpreted as proton--proton (p-p) collisions in MCs overtaken by an SNR shock wave..
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| Keywords:
95.30.Gv
98.58.Db
98.58.Mj
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Received: 11 September 2008
Published: 27 November 2008
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| PACS: |
95.30.Gv
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(Radiation mechanisms; polarization)
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98.58.Db
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(Molecular clouds, H2 clouds, dense clouds, and dark clouds)
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98.58.Mj
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(Supernova remnants)
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