File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Outer-magnetospheric model for Vela-like pulsars: Formation of sub-GeV spectrum

TitleOuter-magnetospheric model for Vela-like pulsars: Formation of sub-GeV spectrum
Authors
KeywordsGamma-Rays: Theory
Methods: Analytical
Pulsars: General Pulsars: Individual: Psr B1706-44
Pulsars: Individual: Vela Pulsar
Radiation Mechanisms: Non-Thermal
Issue Date2004
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/MNR
Citation
Monthly Notices Of The Royal Astronomical Society, 2004, v. 348 n. 1, p. 241-249 How to Cite?
AbstractWe investigate the γ-ray emission from an outer-gap accelerator, which is located in the outer magnetosphere of a pulsar. The charge depletion from the Goldreich-Julian density causes a large electric field along the magnetic field lines. The electric field accelerates electrons and positrons to high energies. We solve the formation of the electric field self-consistently with the radiation and the pair creation processes in one-dimensional geometry along the magnetic field lines, and calculate the curvature spectrum for comparison with the observations. We find that, because the particles escape from the accelerating region with Lorentz factors as large as 107.5, curvature radiation from outside of the gap, in which there is no electric field, still makes an important contribution to the spectrum. Including the outside emission, the model spectra are improved between 100 MeV and 1 GeV for the Vela-type pulsars. Since field line curvature close to the light cylinder affects the spectrum at several hundred MeV, there is a possibility to diagnose the field structure by using the spectrum in these bands. The difference found in the γ-ray spectra of the two pulsars, PSR B0833-45 (Vela) and B1706-44, is deduced from the dimensionless electric current running through the gap. The extension to three-dimensional modelling with self-consistent electrodynamics is necessary to understand the difference in the observed flux between the two pulsars.
Persistent Identifierhttp://hdl.handle.net/10722/174898
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTakata, Jen_US
dc.contributor.authorShibata, Sen_US
dc.contributor.authorHirotani, Ken_US
dc.date.accessioned2012-11-26T08:48:02Z-
dc.date.available2012-11-26T08:48:02Z-
dc.date.issued2004en_US
dc.identifier.citationMonthly Notices Of The Royal Astronomical Society, 2004, v. 348 n. 1, p. 241-249en_US
dc.identifier.issn0035-8711en_US
dc.identifier.urihttp://hdl.handle.net/10722/174898-
dc.description.abstractWe investigate the γ-ray emission from an outer-gap accelerator, which is located in the outer magnetosphere of a pulsar. The charge depletion from the Goldreich-Julian density causes a large electric field along the magnetic field lines. The electric field accelerates electrons and positrons to high energies. We solve the formation of the electric field self-consistently with the radiation and the pair creation processes in one-dimensional geometry along the magnetic field lines, and calculate the curvature spectrum for comparison with the observations. We find that, because the particles escape from the accelerating region with Lorentz factors as large as 107.5, curvature radiation from outside of the gap, in which there is no electric field, still makes an important contribution to the spectrum. Including the outside emission, the model spectra are improved between 100 MeV and 1 GeV for the Vela-type pulsars. Since field line curvature close to the light cylinder affects the spectrum at several hundred MeV, there is a possibility to diagnose the field structure by using the spectrum in these bands. The difference found in the γ-ray spectra of the two pulsars, PSR B0833-45 (Vela) and B1706-44, is deduced from the dimensionless electric current running through the gap. The extension to three-dimensional modelling with self-consistent electrodynamics is necessary to understand the difference in the observed flux between the two pulsars.en_US
dc.languageengen_US
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/MNRen_US
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen_US
dc.subjectGamma-Rays: Theoryen_US
dc.subjectMethods: Analyticalen_US
dc.subjectPulsars: General Pulsars: Individual: Psr B1706-44en_US
dc.subjectPulsars: Individual: Vela Pulsaren_US
dc.subjectRadiation Mechanisms: Non-Thermalen_US
dc.titleOuter-magnetospheric model for Vela-like pulsars: Formation of sub-GeV spectrumen_US
dc.typeArticleen_US
dc.identifier.emailTakata, J: takata@hku.hken_US
dc.identifier.authorityTakata, J=rp00786en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1111/j.1365-2966.2004.07356.xen_US
dc.identifier.scopuseid_2-s2.0-1142276352en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-1142276352&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume348en_US
dc.identifier.issue1en_US
dc.identifier.spage241en_US
dc.identifier.epage249en_US
dc.identifier.isiWOS:000188646100029-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridTakata, J=22735157300en_US
dc.identifier.scopusauthoridShibata, S=7402120464en_US
dc.identifier.scopusauthoridHirotani, K=7003960035en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats