Gamma-ray Emission from Crushed Clouds in Supernova Remnants
It is shown that the radio and gamma-ray emission observed from newly-found 'GeV-bright' supernova remnants (SNRs) can be explained by a model, in which a shocked cloud and shock-accelerated cosmic rays (CRs) frozen in it are simultaneously compressed by the supernova blastwave as a result of formation of a radiative cloud shock. Simple reacceleration of pre-existing CRs is generally sufficient to power the observed gamma-ray emission through the decays of [pi]°-mesons produced in hadronic interactions between high-energy protons (nuclei) and gas in the compressed-cloud layer. This model provides a natural account of the observed synchrotron radiation in SNRs W51C, W44 and IC 443 with flat radio spectral index, which can be ascribed to a combination of secondary and reaccelerated electrons and positrons.
- ISBN 10 : OCLC:873614443
- Judul : Gamma-ray Emission from Crushed Clouds in Supernova Remnants
- Pengarang : ,
- Bahasa : en
- Tahun : 2010
- Halaman : 5
- Halaman : 5
- Google Book : http://books.google.com/books?id=ERpzAQAACAAJ&dq=intitle:Supernova&hl=&source=gbs_api
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Ketersediaan :
It is shown that the radio and gamma-ray emission observed from newly-found 'GeV-bright' supernova remnants (SNRs) can be explained by a model, in which a shocked cloud and shock-accelerated cosmic rays (CRs) frozen in it are simultaneously ...