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Article: The statistics of radio pulsars: A spark model

TitleThe statistics of radio pulsars: A spark model
Authors
KeywordsPulsars: general
Stars: neutron
Stars: statistics
Issue Date2001
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2001, v. 557 n. 1 PART 1, p. 297-303 How to Cite?
AbstractWe use Monte Carlo techniques to relate a theoretical pulsar emission model to the observed distributions of pulse period, magnetic field strength, distance, and luminosity of radio pulsars. We assume that the radio luminosity of pulsars is proportional to the gap potential and current flow from the polar cap. The current is assumed to be nonuniform and clustered in sparks, but only those sparks swept by the line of sight contribute to the observed radio luminosity. We test our model by using the Ruderman-Sutherland vacuum gap potential and find that the simulated distributions are consistent with those observed, with the exception of the period distribution. The model predicts more long-period pulsars than are observed. This discrepancy may result from the model itself, a reduced sensitivity of surveys to long-period pulsars, or the nondipole spin-down of pulsars.
Persistent Identifierhttp://hdl.handle.net/10722/43333
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFan, GLen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorManchester, RNen_HK
dc.date.accessioned2007-03-23T04:43:45Z-
dc.date.available2007-03-23T04:43:45Z-
dc.date.issued2001en_HK
dc.identifier.citationAstrophysical Journal Letters, 2001, v. 557 n. 1 PART 1, p. 297-303en_HK
dc.identifier.issn2041-8205en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43333-
dc.description.abstractWe use Monte Carlo techniques to relate a theoretical pulsar emission model to the observed distributions of pulse period, magnetic field strength, distance, and luminosity of radio pulsars. We assume that the radio luminosity of pulsars is proportional to the gap potential and current flow from the polar cap. The current is assumed to be nonuniform and clustered in sparks, but only those sparks swept by the line of sight contribute to the observed radio luminosity. We test our model by using the Ruderman-Sutherland vacuum gap potential and find that the simulated distributions are consistent with those observed, with the exception of the period distribution. The model predicts more long-period pulsars than are observed. This discrepancy may result from the model itself, a reduced sensitivity of surveys to long-period pulsars, or the nondipole spin-down of pulsars.en_HK
dc.format.extent134222 bytes-
dc.format.extent12158 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_HK
dc.relation.ispartofAstrophysical Journal Lettersen_HK
dc.rightsThe Astrophysical Journal. Copyright © University of Chicago Press.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectPulsars: generalen_HK
dc.subjectStars: neutronen_HK
dc.subjectStars: statisticsen_HK
dc.titleThe statistics of radio pulsars: A spark modelen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-637X&volume=557&issue=pt 1&spage=297&epage=303&date=2001&atitle=The+Statistics+of+Radio+Pulsars:+A+Spark+Modelen_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1086/321646en_HK
dc.identifier.scopuseid_2-s2.0-0035839372en_HK
dc.identifier.hkuros64925-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035839372&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume557en_HK
dc.identifier.issue1 PART 1en_HK
dc.identifier.spage297en_HK
dc.identifier.epage303en_HK
dc.identifier.isiWOS:000170558100026-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridFan, GL=7202776143en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridManchester, RN=7004270810en_HK

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