Abstract
The coupling of the superfluid of a neutron star with the solid crust arising from the scattering of individual nuclei in the inner crust with dynamical vortex lines of the superfluid is investigated. Such interactions generate quantized Kelvin mode vortex oscillations (kelvons). The rate of kelvon production and the consequent drag produced on the superfluid are calculated. The coupling is sufficiently strong to permit glith spin-up time scales ≤60 times the rotation period. Catastrophic vortex-unpinning events are therefore capable of producing giant glitches with rapid spin-ups on the scale observed in the Vela pulsar
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