The supernova remnant W49B as seen with H.E.S.S. and Fermi-LAT*
The supernova remnant (SNR) W49B originated from a core-collapse supernova that occurred between one and four thousand years ago, and subsequently evolved into a mixed-morphology remnant, which is interacting with molecular clouds (MC). Gamma-ray observations of SNR-MC associations are a powerful to...
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| Main Authors: | , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
09 April 2018
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| In: |
Astronomy and astrophysics
Year: 2018, Volume: 612 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201527843 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1051/0004-6361/201527843 Verlag, Volltext: https://www.aanda.org/articles/aa/abs/2018/04/aa27843-15/aa27843-15.html 
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| Author Notes: | H.E.S.S. Collaboration: H. Abdalla, G. Cologna, W. Hofmann, F. Jankowsky, M. Mohamed, A. Quirrenbach, F. Rieger, S. Schwemmer, S.J. Wagner [und weitere] |
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| 245 | 1 | 4 | |a The supernova remnant W49B as seen with H.E.S.S. and Fermi-LAT* |c H.E.S.S. Collaboration: H. Abdalla, G. Cologna, W. Hofmann, F. Jankowsky, M. Mohamed, A. Quirrenbach, F. Rieger, S. Schwemmer, S.J. Wagner [und weitere] |
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| 520 | |a The supernova remnant (SNR) W49B originated from a core-collapse supernova that occurred between one and four thousand years ago, and subsequently evolved into a mixed-morphology remnant, which is interacting with molecular clouds (MC). Gamma-ray observations of SNR-MC associations are a powerful tool to constrain the origin of Galactic cosmic rays, as they can probe the acceleration of hadrons through their interaction with the surrounding medium and subsequent emission of non-thermal photons. We report the detection of a <i>γ<i/>-ray source coincident with W49B at very high energies (VHE; <i>E<i/> > 100 GeV) with the H.E.S.S. Cherenkov telescopes together with a study of the source with five years of <i>Fermi<i/>-LAT high-energy <i>γ<i/>-ray (0.06-300 GeV) data. The smoothly connected, combined source spectrum, measured from 60 MeV to multi-TeV energies, shows two significant spectral breaks at 304 ± 20 MeV and GeV; the latter is constrained by the joint fit from the two instruments. The detected spectral features are similar to those observed in several other SNR-MC associations and are found to be indicative of <i>γ<i/>-ray emission produced through neutral-pion decay. | ||
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| 700 | 1 | |a Jankowsky, Felix |e VerfasserIn |0 (DE-588)1057860042 |0 (DE-627)795338953 |0 (DE-576)413828832 |4 aut | |
| 700 | 1 | |a Mohamed, Mahmoud |e VerfasserIn |0 (DE-588)1034847023 |0 (DE-627)746328044 |0 (DE-576)382466330 |4 aut | |
| 700 | 1 | |a Quirrenbach, Andreas |e VerfasserIn |0 (DE-588)112240623 |0 (DE-627)593634780 |0 (DE-576)304098167 |4 aut | |
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