Expectancy of Large Pulsar Glitches - a Comparison of Models with the Observed Glitch Sample

Details Expectancy of Large Pulsar Glitches - a Comparison of Models with the Observed Glitch Sample Expectancy of Large Pulsar Glitches - a Comparison of Models with the Observed Glitch Sample

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.269..849a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 269, NO. 4/AUG15, P. 849, 1994

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Scientific paper

We study the expectancy of large glitches (AQ / > 10- ) from a sample of 430 pulsars other than the Vela pulsar. The pulsars in this sample have exhibited 19 large glitches. We assume that all pulsars experience such glitches, with rates that depend on the pulsar's rotation rate Q and spin-down rate , and on the glitch model. We use the core-quake model, and two variants of the supeffluid vortex unpinning model, and choose model parameters such that the observed number of glitches is matched by the theoretically expected number. Among the models investigated, one of the superfluid vortex unpinning models gives good agreement with the observed distribution of glitches and with the parameter values deduced for the Vela pulsar glitches. Key words: MHD - stars: interiors - pulsars: general - stars: rotation.

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