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Article: On the fast recovery of the Vela pulsar from its christmas 1988 glitch

TitleOn the fast recovery of the Vela pulsar from its christmas 1988 glitch
Authors
Issue Date1990
PublisherNature Publishing Group. The Journal's web site is located at http://www.nature.com/nature
Citation
Nature, 1990, v. 348 n. 6303, p. 707-708 How to Cite?
AbstractTHE Vela pulsar, whose most recent (eighth) glitch occurred during an observing session1, is the first to have been 'caught in the act'. Post-glitch timing observations2 of the rapid (≲ 1 day) recovery of the pulsar's rotation put significant constraints on the conventional model of a glitch, according to which vortices in the rotating superfluid interior of the neutron star, whose ends are pinned to nuclei in the star's crust, abruptly move to new pinned locations3. The large initial jump in the spin-down rate Ω and its prompt recovery seem to imply that an improbably large 20% of the total moment of inertia resides in the crust. We show here, however, that the fast response can be understood in terms of the dynamics of a portion of the pinned crustal superfluid4,5, amounting to ∼5.4 × 10-3 of the total moment of inertia, linearly coupled to the star's superfluid interior. This fraction is consistent with values previously deduced for the Vela pulsar6 and others, including PSR0355+54 (ref. 4), which also showed a large jump7 in Ω̇. By modelling the post-glitch relaxation, we estimate the vortex pinning energy at ∼0.3 MeV, also consistent with earlier estimates.
Persistent Identifierhttp://hdl.handle.net/10722/174856
ISSN
2015 Impact Factor: 38.138
2015 SCImago Journal Rankings: 21.936

 

DC FieldValueLanguage
dc.contributor.authorAlpar, MAen_US
dc.contributor.authorPines, Den_US
dc.contributor.authorCheng, KSen_US
dc.date.accessioned2012-11-26T08:47:50Z-
dc.date.available2012-11-26T08:47:50Z-
dc.date.issued1990en_US
dc.identifier.citationNature, 1990, v. 348 n. 6303, p. 707-708en_US
dc.identifier.issn0028-0836en_US
dc.identifier.urihttp://hdl.handle.net/10722/174856-
dc.description.abstractTHE Vela pulsar, whose most recent (eighth) glitch occurred during an observing session1, is the first to have been 'caught in the act'. Post-glitch timing observations2 of the rapid (≲ 1 day) recovery of the pulsar's rotation put significant constraints on the conventional model of a glitch, according to which vortices in the rotating superfluid interior of the neutron star, whose ends are pinned to nuclei in the star's crust, abruptly move to new pinned locations3. The large initial jump in the spin-down rate Ω and its prompt recovery seem to imply that an improbably large 20% of the total moment of inertia resides in the crust. We show here, however, that the fast response can be understood in terms of the dynamics of a portion of the pinned crustal superfluid4,5, amounting to ∼5.4 × 10-3 of the total moment of inertia, linearly coupled to the star's superfluid interior. This fraction is consistent with values previously deduced for the Vela pulsar6 and others, including PSR0355+54 (ref. 4), which also showed a large jump7 in Ω̇. By modelling the post-glitch relaxation, we estimate the vortex pinning energy at ∼0.3 MeV, also consistent with earlier estimates.en_US
dc.languageengen_US
dc.publisherNature Publishing Group. The Journal's web site is located at http://www.nature.com/natureen_US
dc.relation.ispartofNatureen_US
dc.titleOn the fast recovery of the Vela pulsar from its christmas 1988 glitchen_US
dc.typeArticleen_US
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_US
dc.identifier.authorityCheng, KS=rp00675en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0040952255en_US
dc.identifier.volume348en_US
dc.identifier.issue6303en_US
dc.identifier.spage707en_US
dc.identifier.epage708en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridAlpar, MA=6701508412en_US
dc.identifier.scopusauthoridPines, D=16485047900en_US
dc.identifier.scopusauthoridCheng, KS=9745798500en_US

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