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Article: Fermi-LAT study of Gamma-ray emission in the direction of supernova remnant W49B

TitleFermi-LAT study of Gamma-ray emission in the direction of supernova remnant W49B
Authors
KeywordsAcceleration Of Particles
Ism: Individual Objects (W49b)
Radiation Mechanisms: Non-Thermal
Issue Date2010
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2010, v. 722 n. 2, p. 1303-1311 How to Cite?
AbstractWe present an analysis of the gamma-ray data obtained with the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope in the direction of SNR W49B (G43.3-0.2). A bright unresolved gamma-ray source detected at a significance of 38s is found to coincide with SNR W49B. The energy spectrum in the 0.2-200 GeV range gradually steepens toward high energies. The luminosity is estimated to be 1.5 × 1036 (D/8 kpc)2 erg s -1 in this energy range. There is no indication that the gamma-ray emission comes from a pulsar. Assuming that the supernova remnant (SNR) shell is the site of gamma-ray production, the observed spectrum can be explained either by the decay of neutral π mesons produced through the proton-proton collisions or by electron bremsstrahlung. The calculated energy density of relativistic particles responsible for the LAT flux is estimated to be remarkably large, Ue,p > 104 eVcm-3, for either gamma-ray production mechanism. © 2010. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
Persistent Identifierhttp://hdl.handle.net/10722/188398
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
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dc.date.accessioned2013-09-03T04:05:17Z-
dc.date.available2013-09-03T04:05:17Z-
dc.date.issued2010en_US
dc.identifier.citationAstrophysical Journal Letters, 2010, v. 722 n. 2, p. 1303-1311en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/188398-
dc.description.abstractWe present an analysis of the gamma-ray data obtained with the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope in the direction of SNR W49B (G43.3-0.2). A bright unresolved gamma-ray source detected at a significance of 38s is found to coincide with SNR W49B. The energy spectrum in the 0.2-200 GeV range gradually steepens toward high energies. The luminosity is estimated to be 1.5 × 1036 (D/8 kpc)2 erg s -1 in this energy range. There is no indication that the gamma-ray emission comes from a pulsar. Assuming that the supernova remnant (SNR) shell is the site of gamma-ray production, the observed spectrum can be explained either by the decay of neutral π mesons produced through the proton-proton collisions or by electron bremsstrahlung. The calculated energy density of relativistic particles responsible for the LAT flux is estimated to be remarkably large, Ue,p > 104 eVcm-3, for either gamma-ray production mechanism. © 2010. The American Astronomical Society. All rights reserved. Printed in the U.S.A.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_US
dc.relation.ispartofAstrophysical Journal Lettersen_US
dc.subjectAcceleration Of Particlesen_US
dc.subjectIsm: Individual Objects (W49b)en_US
dc.subjectRadiation Mechanisms: Non-Thermalen_US
dc.titleFermi-LAT study of Gamma-ray emission in the direction of supernova remnant W49Ben_US
dc.typeArticleen_US
dc.identifier.emailSaz Parkinson, PM: pablosp@hku.hken_US
dc.identifier.authoritySaz Parkinson, PM=rp01803en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/0004-637X/722/2/1303en_US
dc.identifier.scopuseid_2-s2.0-78149236068en_US
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dc.identifier.volume722en_US
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dc.identifier.spage1303en_US
dc.identifier.epage1311en_US
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