Pulsar glitches as probes of neutron star interiors

Details Pulsar glitches as probes of neutron star interiors Pulsar glitches as probes of neutron star interiors

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.359..616l&link_type=abstract

Nature (ISSN 0028-0836), vol. 359, no. 6396, p. 616-618.

Physics

28

Neutron Stars, Pulsars, Stellar Interiors, Stellar Physics, Stellar Rotation, Angular Momentum, Moments Of Inertia, Momentum Transfer

Scientific paper

Pulsar glitches are thought to be consequences of angular momentum transfer between a solid crust, which rotates at the measured pulsar periodicity, and a more rapidly rotating 'loose' component of the neutron star interior. Earlier studies, using particular models for the coupling between crust and interior, showed that the loose component carries about 2.8 percent and over about 1 percent of the total moment of inertia of the Vela pulsar and PSR 1737-30, respectively. Postglitch recovery in four pulsars is analyzed here, and it is deduced that the loose component carries at least 0.8 percent of the total moment of inertia, independent of the form of the coupling. In the context of the 'vortex creep' model of recovery, in which the loose component is the inner-crust neutron superfluid, the constraint on the moment of inertia rules out equations of state that are soft at high densities.

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