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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1602
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dc.contributor.authorNarayan, R.-
dc.contributor.authorVivekanand, M.-
dc.date.accessioned2006-12-19T10:50:23Z-
dc.date.available2006-12-19T10:50:23Z-
dc.date.issued1983-06-
dc.identifier.citationAstronomy and Astrophysics, 1983, Vol.122, p45-53.en
dc.identifier.issn0004-6361-
dc.identifier.urihttp://hdl.handle.net/2289/1602-
dc.description.abstractThe total change in the position angle of the linear polarization in 16 pulsars is analyzed (assuming the Radhakrishnan-Cooke (1969) magnetic pole model of pulsar radiation), on the basis of Backer and Rankin's (1980) observational data. The pulsar beams are on the average highly elongated, with the ratio R of the North-South to East-West dimensions being 3.0 + or - 0.4. The R estimate further increases if one allows for reasonable selection effects. The evolution of R with pulsar period P naturally accounts for the P dependence of interpulse occurrence. The evolution of the pulsar beaming fraction f with P renders more certain the recent observation of a deficit of short P pulsars in the Galaxy. Current pulsar electrodynamics and radio beam theories may have to be revised to account for the present results.en
dc.format.extent1571746 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherSpringer-Verlagen
dc.relation.urihttp://adsabs.harvard.edu/cgi-bin/bib_query?1983A&A...122...45Nen
dc.rights(1983) by the European Southern Observatory. Scanned images provided by the NASA ADS.en
dc.subjectLinear polarizationen
dc.subjectMagnetic polesen
dc.subjectPolarization characteristicsen
dc.subjectPulsarsen
dc.subjectStellar evolutionen
dc.subjectBeams(radiation)en
dc.subjectElongationen
dc.subjectMilky way galaxyen
dc.subjectPeriodic variationsen
dc.subjectPolar capsen
dc.subjectStellar modelsen
dc.titleEvidence for evolving elongated pulsar beamsen
dc.typeArticleen
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