Excitation of small-amplitude free precession in the Crab pulsar

Details Excitation of small-amplitude free precession in the Crab pulsar Excitation of small-amplitude free precession in the Crab pulsar

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.235..545j&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 235, Dec. 1, 1988, p. 545-550.

Statistics

Computation

22

Computational Astrophysics, Crab Nebula, Precession, Pulsars, Euler Equations Of Motion, Neutron Stars, Stellar Interiors, Superfluidity

Scientific paper

The quasi-periodic timing residuals derived at Jodrell Bank for the Crab nebula pulsar are considered to be evidence for small-amplitude free precession of the neutron star. Its excitation is a consequence of discontinuous changes in the distortion of the solid crust during spin-down. The existence of small-amplitude free precession, with a 620-day period, requires that superfluid neutron vortices in the neutron-drip solid crust move freely with the spin vector. It is not consistent with currently accepted models of pinning and of thermally activated vortex creep.

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