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Conference Paper: A three-dimensional outer-magnetospheric gap model for gamma-ray pulsars: I. The crab pulsar

TitleA three-dimensional outer-magnetospheric gap model for gamma-ray pulsars: I. The crab pulsar
Authors
Issue Date2000
PublisherAstronomical Society of the Pacific. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=IAU
Citation
Highly Energetic Physical Processes and Mechanisms for Emission from Astrophysical Plasmas, International Astronomical Union Proceedings, , v. 195, p. 223-232 How to Cite?
AbstractWe use a three-dimensional pulsar magnetosphere model to study the geometry of outer-magnetospheric gaps. The vertical size of the 'outer gap' is first determined by a self-consistent model in which the outer gap size is limited by pair production from collisions between (1) thermal photons produced from polar cap heating by backflow 'outer gap' current, and (2) the curvature photons emitted by gap-accelerated charged particles. The transverse size of the outer gap is also determined by local pair production limits. In principle, there are two topologically disconnected outer gaps in the magnetosphere of a pulsar. Both incoming and outgoing particle flows are allowed. However, the emission morphologies produced by incoming particle flow is severely restricted by local pair production in the gap and the absorption of magnetic pair production near the star. Double-peaked light curves with strong bridges are most common. From the three-dimensional structure of the outer gap and its local properties, we calculate the emission morphologies and phase-resolved spectra of gamma-ray pulsars. Applications to the Crab pulsar illustrate the model.
Persistent Identifierhttp://hdl.handle.net/10722/47037

 

DC FieldValueLanguage
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorRuderman, Men_HK
dc.contributor.authorZhang, Len_HK
dc.date.accessioned2007-10-30T07:05:00Z-
dc.date.available2007-10-30T07:05:00Z-
dc.date.issued2000en_HK
dc.identifier.citationHighly Energetic Physical Processes and Mechanisms for Emission from Astrophysical Plasmas, International Astronomical Union Proceedings, , v. 195, p. 223-232en_HK
dc.identifier.urihttp://hdl.handle.net/10722/47037-
dc.description.abstractWe use a three-dimensional pulsar magnetosphere model to study the geometry of outer-magnetospheric gaps. The vertical size of the 'outer gap' is first determined by a self-consistent model in which the outer gap size is limited by pair production from collisions between (1) thermal photons produced from polar cap heating by backflow 'outer gap' current, and (2) the curvature photons emitted by gap-accelerated charged particles. The transverse size of the outer gap is also determined by local pair production limits. In principle, there are two topologically disconnected outer gaps in the magnetosphere of a pulsar. Both incoming and outgoing particle flows are allowed. However, the emission morphologies produced by incoming particle flow is severely restricted by local pair production in the gap and the absorption of magnetic pair production near the star. Double-peaked light curves with strong bridges are most common. From the three-dimensional structure of the outer gap and its local properties, we calculate the emission morphologies and phase-resolved spectra of gamma-ray pulsars. Applications to the Crab pulsar illustrate the model.en_HK
dc.format.extent1082010 bytes-
dc.format.extent4555 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherAstronomical Society of the Pacific. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=IAUen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleA three-dimensional outer-magnetospheric gap model for gamma-ray pulsars: I. The crab pulsaren_HK
dc.typeConference_Paperen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.hkuros55908-

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