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Type: Conference paper
Title: Constraints on the cosmic ray diffusion coefficient in the W28 region from gamma-ray observations
Author: Gabici, S.
Casanova, S.
Aharonian, F.
Rowell, G.
Citation: Proceedings of Société Française d’Astronomie et d’Astrophysique (SF2A 2010), held in Marseille, France, 21-24 June 2010: pp.313-317
Publisher: SF2A
Publisher Place: online
Issue Date: 2010
Conference Name: Société Française d’Astronomie et d’Astrophysique (2010 : Marseille, France)
Statement of
S. Gabici, S. Casanova, F. A. Aharonian and G. Rowell
Abstract: GeV and TeV gamma rays have been detected from the supernova remnant W28 and its surroundings. Such emission correlates quite well with the position of dense and massive molecular clouds and thus it is often interpreted as the result of hadronic cosmic ray interactions in the dense gas. Constraints on the cosmic ray diffusion coeffcient in the region can be obtained, under the assumption that the cosmic rays responsible for the gamma ray emission have been accelerated in the past at the supernova remnant shock, and subsequently escaped in the surrounding medium. In this scenario, gamma ray observations can be explained only if the diffusion coeffcient in the region surrounding the supernova remnant is significantly suppressed with respect to the average galactic one.
Keywords: cosmic rays
gamma rays
supernova remnants
Rights: Copyright Societe Francaise d'Astronomie et d'Astrophysique (SF2A) 2010
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Appears in Collections:Aurora harvest
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