A cellular automaton model of pulsar glitches
L Warszawski, A Melatos
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2008
A cellular automaton model of pulsar glitches is described, based on the superfluid vortex unpinning paradigm. Recent analyses of pulsar glitch data suggest that glitches result from scale-invariant avalanches, which are consistent with a self-organized critical system (SOCS). A cellular automaton provides a computationally efficient means of modelling the collective behaviour of up to 1016 vortices in the pulsar interior, whilst ensuring that the dominant aspects of the microphysics are not lost. The automaton generates avalanche distributions that are qualitatively consistent with a SOCS and with glitch data. The probability density functions of glitch sizes and durations are power laws, a..View full abstract
We thank Carlos Peralta for sharing his up-to-date glitch catalogue, and Stuart Wyithe for advice on statistical methods. LW acknowledges the support of an Australian Postgraduate Award. The authors thank the referee, Ali Alpar, for his insightful and constructive feedback.