The dynamics of pulsar glitches: Contrasting phenomenology with numerical evolutions

Understand

In this paper we consider a simple two-fluid model for pulsar glitches.

• We derive the basic equations that govern the spin evolution of the system from two-fluid hydrodynamics, accounting for the vortex mediated mutual friction force that determines the glitch rise.
• This leads to a simple "bulk" model that can be used to describe the main properties of a glitch event resulting from vortex unpinning.
• In order to model the long term relaxation following the glitch our model would require additional assumptions regarding the repinning of vortices, an issue that we only touch upon briefly.