Outer magnetospheric fluctuations and pulsar timing noise

Statistics – Computation

Scientific paper

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Energy Dissipation, Magnetospheric Instability, Neutron Stars, Pulsar Magnetospheres, Pulsars, Random Walk, White Noise, Compton Effect, Computational Astrophysics, Equations Of State, Stellar Interiors, Stellar Magnetic Fields, Stellar Rotation, Time Dependence

Scientific paper

The Cheng, Ho, and Ruderman (1986) outer-magnetosphere gap model was used to investigate the stability of Crab-type outer magnetosphere gaps for pulsars having the parameter (Omega-square B) similar to that of the Crab pulsar. The Lamb, Pines, and Shaham (1978) fluctuating magnetosphere noise model was applied to the Crab pulsar to examine the type of the equation of state that best describes the structure of the neutron star. The noise model was also applied to other pulsars, and the theoretical results were compared with observational data. The results of the comparison are consistent with the stiff equation of state, as suggested by the vortex creep model of the neutron star interior. The timing-noise observations also contribute to the evidence for the existence of superfluid in the core of the neutron star.

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