# A possible way to reconcile long-period precession with vortex pinning in neutron stars

## TL;DR

This paper proposes a model where neutron star core vortex pinning and long-period precession coexist by assuming the core can rotate independently, addressing a key inconsistency in pulsar glitch theories.

## Contribution

It introduces a three-component model allowing vortex pinning and precession to coexist, with observational constraints on interaction coefficients.

## Key findings

- Vortex pinning can occur in the magnetically decoupled core region.
- Long-period precession and vortex pinning are compatible in the same pulsar.
- Constraints on interaction coefficients are derived from observational data.

## Abstract

We propose a possible way to solve the problem of inconsistency between the neutron star long-period precession and superfluid vortex pinning, which is the basis of the most successful theories of pulsar glitches. We assume that the pinning takes place in the region of the neutron star core, which, being magnetically decoupled, can rotate relative to the crust. In the framework of a simple three-component model we show that these two phenomena can coexist in the same pulsar. Some constraints on the formally introduced interaction coefficients following from observation data are formulated.