Impact of neutron star oscillations on the accelerating electric field in the polar cap of pulsar: or could we see oscillations of the neutron star after the glitch in pulsar?

Abstract

Pulsar "standard model", that considers a pulsar as a rotating magnetized conducting sphere surrounded by plasma, is generalized to the case of oscillating star. We developed an algorithm for calculation of the Goldreich-Julian charge density for this case. We consider distortion of the accelerating zone in the polar cap of pulsar by neutron star oscillations. It is shown that for oscillation modes with high harmonic numbers (l,m) changes in the Goldreich-Julian charge density caused by pulsations of neutron star could lead to significant altering of an accelerating electric field in the polar cap of pulsar. In the moderately optimistic scenario, that assumes excitation of the neutron star oscillations by glitches, it could be possible to detect altering of the pulsar radioemission due to modulation of the accelerating field.

arXiv comment7 pages, 8 figures. Presented at the conference "Isolated Neutron Stars: from the Interior to the Surface", London, April 24-28, 2006; to appear in Astrophysics and Space Science

References in corpus (2)

• Magnetosphere of Oscillating Neutron Star. Nonvacuum Treatment
• Self-similar pressure oscillations in neutron star envelopes as probes of neutron star structure

Cited by in corpus (8)

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• General Relativistic Magnetospheres of Slowly Rotating and Oscillating Magnetized Neutron Stars
• Explaining radio emission of magnetars via rotating and oscillating magnetospheres of neutron stars
• The Magnetosphere of Oscillating Neutron Stars in General Relativity
• A Non-Radial Oscillation Model for Pulsar State Switching
• Particle acceleration in the polar cap region of an oscillating neutron star