Glitches in neutron stars with magnetically decoupled core

TL;DR

This paper explores a magnetically decoupled core model in neutron stars to explain pulsar glitches, analyzing spin-up timescales and comparing them with observational data for different pulsars.

Contribution

It investigates the glitch spin-up process within the magnetically decoupled core model and compares theoretical estimations with observational data.

Findings

Crab pulsar likely has a magnetically decoupled core

Vela pulsar results are more controversial

Estimated spin-up timescales align with observations for Crab

Abstract

The magnetically decoupled core model was proposed earlier as a way to solve the problem of inconsistency between the neutron star long-period precession and superfluid vortex pinning which is the base of most theories of pulsar glitches. It was assumed that the pinning takes place in the region of the neutron star core which, being magnetically decoupled, can rotate relative to the crust. In present work some aspects of the glitch spin-up stage in the framework of the proposed model are discussed. Estimated spin-up time-scales are compared with observational data. According to the estimations the Crab pulsar is likely posses a magnetically decoupling core region, while the results for the Vela pulsar is more controversial.