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TeV -rays from oldsupernova remnants Ryo YamazakiKazunori KohriAya Bamba2006 год

TeV -rays from old supernova remnants
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Аннотация: We study the emission from an old supernova remnant (SNR) with an age of around 10^5 yrs and that from a giant molecular cloud (GMC) encountered by the SNR. When the SNR age is around 10^5 yrs, proton acceleration is efficient enough to emit TeV gamma-rays both at the shock of the SNR and that in the GMC. The maximum energy of primarily accelerated electrons is so small that TeV gamma-rays and X-rays are dominated by hadronic processes, pi^0-decay and synchrotron radiation from secondary electrons, respectively. However, if the SNR is older than several 10^5 yrs, there are few high-energy particles emitting TeV gamma-rays because of the energy loss effect and/or the wave damping effect occurring at low-velocity isothermal shocks. For old SNRs or SNR-GMC interacting systems capable of generating TeV gamma-ray emitting particles, we calculated the ratio of TeV gamma-ray (1-10 TeV) to X-ray (2-10 keV) energy flux and found that it can be more than ~10^2. Such a source showing large flux ratio may be a possible origin of recently discovered unidentified TeV sources.
Год издания: 2006
Авторы: Ryo Yamazaki, Kazunori Kohri, Aya Bamba, T. Yoshida, Toru Tsuribe, Fumio Takahara
Издательство: Oxford University Press
Источник: Monthly Notices of the Royal Astronomical Society
Ключевые слова: Astrophysics and Cosmic Phenomena, Neutrino Physics Research, Dark Matter and Cosmic Phenomena
Другие ссылки: Monthly Notices of the Royal Astronomical Society (PDF)
Monthly Notices of the Royal Astronomical Society (HTML)
Hiroshima University Acedemic Information Repository (Hiroshima University) (PDF)
Hiroshima University Acedemic Information Repository (Hiroshima University) (HTML)
DataCite API (HTML)