Journal article

Gross-Pitaevskii model of pulsar glitches

L Warszawski, A Melatos

Monthly Notices of the Royal Astronomical Society | OXFORD UNIV PRESS | Published : 2011

Abstract

The first large-scale quantum mechanical simulations of pulsar glitches are presented, using a Gross-Pitaevskii model of the crust-superfluid system in the presence of pinning. Power-law distributions of simulated glitch sizes are obtained, in accord with astronomical observations, with exponents ranging from -0.55 to -1.26. Examples of large-scale simulations, containing ~200 vortices, reveal that these statistics persist in the many-vortex limit. Waiting-time distributions are also constructed. These and other statistics support the hypothesis that catastrophic unpinning mediated by collective vortex motion produces glitches; indeed, such collective events are seen in time-lapse movies of ..

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University of Melbourne Researchers

Grants

Funding Acknowledgements

We thank Dr Andrew Martin and Dr Natalia Berloff for enlightening discussions on many of the topics addressed in this paper. LW acknowledges the support of an Australian Postgraduate Award.