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Article: High-energy component of GRB 941017 revisited and the reverse-shock synchrotron self-Compton emission

TitleHigh-energy component of GRB 941017 revisited and the reverse-shock synchrotron self-Compton emission
Authors
KeywordsGamma Rays: Bursts
Radiation Mechanisms: Non-Thermal
Issue Date2005
PublisherE D P Sciences. The Journal's web site is located at http://www.aanda.org
Citation
Astronomy And Astrophysics, 2005, v. 439 n. 3, p. 957-961 How to Cite?
AbstractThe different temporal behaviors of the high energy component and the hundreds of keV emission from GRB 941017 suggest that they come from different emission regions. The nearly constant flux of this high energy component is consistent with being produced in the region of the early external shock formed when the ejecta hit the surrounding medium. Here we show that the relatively hard spectrum of this component can be numerically modelled as the synchrotron self-Compton emission from external reverse shock when the ejecta is decelerated by a typical interstellar medium. Constraints on the parameters of the fireball, such as the initial Lorentz factor η, the burst energy, and the magnetic field equipartition fraction are obtained. Very high initial Lorentz factor (η ≳ 103) inferred for this burst may explain the rarity of this kind of high-energy component in gamma-ray bursts (GRBs). Large GeV-TeV flux from the reverse shock is predicted for GRBs with high initial Lorentz factors. © ESO 2005.
Persistent Identifierhttp://hdl.handle.net/10722/174960
ISSN
2014 Impact Factor: 4.378
2015 SCImago Journal Rankings: 2.446
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, XYen_US
dc.contributor.authorCheng, KSen_US
dc.contributor.authorDai, ZGen_US
dc.contributor.authorLu, Ten_US
dc.date.accessioned2012-11-26T08:48:22Z-
dc.date.available2012-11-26T08:48:22Z-
dc.date.issued2005en_US
dc.identifier.citationAstronomy And Astrophysics, 2005, v. 439 n. 3, p. 957-961en_US
dc.identifier.issn0004-6361en_US
dc.identifier.urihttp://hdl.handle.net/10722/174960-
dc.description.abstractThe different temporal behaviors of the high energy component and the hundreds of keV emission from GRB 941017 suggest that they come from different emission regions. The nearly constant flux of this high energy component is consistent with being produced in the region of the early external shock formed when the ejecta hit the surrounding medium. Here we show that the relatively hard spectrum of this component can be numerically modelled as the synchrotron self-Compton emission from external reverse shock when the ejecta is decelerated by a typical interstellar medium. Constraints on the parameters of the fireball, such as the initial Lorentz factor η, the burst energy, and the magnetic field equipartition fraction are obtained. Very high initial Lorentz factor (η ≳ 103) inferred for this burst may explain the rarity of this kind of high-energy component in gamma-ray bursts (GRBs). Large GeV-TeV flux from the reverse shock is predicted for GRBs with high initial Lorentz factors. © ESO 2005.en_US
dc.languageengen_US
dc.publisherE D P Sciences. The Journal's web site is located at http://www.aanda.orgen_US
dc.relation.ispartofAstronomy and Astrophysicsen_US
dc.subjectGamma Rays: Burstsen_US
dc.subjectRadiation Mechanisms: Non-Thermalen_US
dc.titleHigh-energy component of GRB 941017 revisited and the reverse-shock synchrotron self-Compton emissionen_US
dc.typeArticleen_US
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_US
dc.identifier.authorityCheng, KS=rp00675en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1051/0004-6361:20052984en_US
dc.identifier.scopuseid_2-s2.0-24944536219en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-24944536219&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume439en_US
dc.identifier.issue3en_US
dc.identifier.spage957en_US
dc.identifier.epage961en_US
dc.identifier.isiWOS:000231206900014-
dc.publisher.placeFranceen_US
dc.identifier.scopusauthoridWang, XY=9745320700en_US
dc.identifier.scopusauthoridCheng, KS=9745798500en_US
dc.identifier.scopusauthoridDai, ZG=7201387760en_US
dc.identifier.scopusauthoridLu, T=7402684810en_US

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