2022/12/08 by Shuang Du, Du, Shuang
Earth and Planetary Sciences · Physics and Astronomy · #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #High-pressure geophysics and materials #Pulsars and Gravitational Waves Research #earthquake and tectonic studies
paper · pdf · doi:10.48550/arxiv.2301.04602
openalex publication_date 2022/12/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Glitches are sudden spin-up events of pulsars and are usually thought to be induced by unpinning of neutron superfluid vortices in pulsar crusts. Unpinning and repinning of superfluid vortices, and even thermoelectric effects induced by the deposited heat released during glitches, may vary the velocity fields in pulsars. We show that the generally invoked magnetic dipole fields of pulsars cannot remain stationary during the variation of the velocity fields, so that multipole components must be generated. We argue that the increase of the spark frequency of periodic radio pulses is the indicator for the emergence of the multipole components. Interpretations of pulsar nulling, rebrightening of radio-quiet magnetars, differences between Crab and Vela pulsars after glitches, and extra-galactic fast radio burst-like events from SGR 1935+2154 have been proposed based on the influence of the variation of the velocity field on the magnetic field.