Constraints on the cosmic ray diffusion coefficient in the W28 region from gamma-ray observations

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dc.contributor.authorGabici, S.
dc.contributor.authorCasanova, S.
dc.contributor.authorAharonian, F.
dc.contributor.authorRowell, G.
dc.contributor.conferenceSociété Française d’Astronomie et d’Astrophysique (2010 : Marseille, France)
dc.date.issued2010
dc.description.abstractGeV 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.
dc.description.statementofresponsibilityS. Gabici, S. Casanova, F. A. Aharonian and G. Rowell
dc.identifier.citationProceedings of Société Française d’Astronomie et d’Astrophysique (SF2A 2010), held in Marseille, France, 21-24 June 2010: pp.313-317
dc.identifier.orcidRowell, G. [0000-0002-9516-1581]
dc.identifier.urihttp://hdl.handle.net/2440/64435
dc.language.isoen
dc.publisherSF2A
dc.publisher.placeonline
dc.rightsCopyright Societe Francaise d'Astronomie et d'Astrophysique (SF2A) 2010
dc.source.urihttp://sf2a.cesr.fr/php/spip/spip.php?article279
dc.subjectcosmic rays
dc.subjectgamma rays
dc.subjectsupernova remnants
dc.titleConstraints on the cosmic ray diffusion coefficient in the W28 region from gamma-ray observations
dc.typeConference paper
pubs.publication-statusPublished

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