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Article: The unusual second derivative of the millisecond pulsar 1620-26: The consequence of a giant glitch?

TitleThe unusual second derivative of the millisecond pulsar 1620-26: The consequence of a giant glitch?
Authors
KeywordsAngular velocity
Binary stars
Error analysis
Pulsars
Stellar magnetic fields
Issue Date1994
PublisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/ApJ
Citation
The Astrophysical Journal, 1994, v. 434 n. 2, p. 733-737 How to Cite?
AbstractWe suggest that the unusually large second derivative of angular velocity of PSR 1620-26 may result from a recent giant glitch which occurred more than 30 yr ago, instead of being caused by a second companion orbiting around the binary system of the pulsar. Our model parameters predict that either the core magnetic field of this pulsar is much stronger than its surface magnetic field if the internal torque is produced by the core superfluid, or the third derivative of Omega is actually larger than the present upper limit by a factor of several if the internal torque is produced by the crustal superfluid. The former case will indicate that the internal magnetic fields of both the canonical pulsars and millisecond pulsars are the same. We further suggest that PSR 1620-26 should be a soft X-ray source with Lx approximately equals 5 x 1032/ergs and characteristic energy Egamma approximately equals 200 eV.
Persistent Identifierhttp://hdl.handle.net/10722/43229
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorChong, Nen_HK
dc.contributor.authorLee, TMen_HK
dc.date.accessioned2007-03-23T04:41:45Z-
dc.date.available2007-03-23T04:41:45Z-
dc.date.issued1994en_HK
dc.identifier.citationThe Astrophysical Journal, 1994, v. 434 n. 2, p. 733-737en_HK
dc.identifier.issn0004-637Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/43229-
dc.description.abstractWe suggest that the unusually large second derivative of angular velocity of PSR 1620-26 may result from a recent giant glitch which occurred more than 30 yr ago, instead of being caused by a second companion orbiting around the binary system of the pulsar. Our model parameters predict that either the core magnetic field of this pulsar is much stronger than its surface magnetic field if the internal torque is produced by the core superfluid, or the third derivative of Omega is actually larger than the present upper limit by a factor of several if the internal torque is produced by the crustal superfluid. The former case will indicate that the internal magnetic fields of both the canonical pulsars and millisecond pulsars are the same. We further suggest that PSR 1620-26 should be a soft X-ray source with Lx approximately equals 5 x 1032/ergs and characteristic energy Egamma approximately equals 200 eV.en_HK
dc.format.extent921721 bytes-
dc.format.extent12158 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/ApJen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsThe Astrophysical Journal. Copyright © University of Chicago Press.en_HK
dc.subjectAngular velocityen_HK
dc.subjectBinary starsen_HK
dc.subjectError analysisen_HK
dc.subjectPulsarsen_HK
dc.subjectStellar magnetic fieldsen_HK
dc.titleThe unusual second derivative of the millisecond pulsar 1620-26: The consequence of a giant glitch?en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-637X&volume=434&issue=2&spage=733&epage=737&date=1994&atitle=The+unusual+second+derivative+of+the+millisecond+pulsar+1620-26:+The+consequence+of+a+giant+glitch?en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1086/174775en_HK
dc.identifier.hkuros3245-
dc.identifier.isiWOS:A1994PL83700035-

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