# Pulsar rotation with superfluid entrainment

## TL;DR

This paper investigates how superfluid entrainment affects the angular momentum exchange in neutron star glitches, using a global model and new mesoscopic pinning force calculations to better understand the glitch mechanism.

## Contribution

It introduces a consistent global model incorporating superfluid entrainment and new pinning force calculations to estimate the maximum angular momentum reservoir in neutron star glitches.

## Key findings

- Entrainment significantly limits the angular momentum exchange during glitches.
- New mesoscopic pinning forces provide a more accurate estimate of the superfluid's angular momentum capacity.
- The model offers a quantitative test for neutron star microphysics and global rotation models.

## Abstract

Large pulsar glitches (like the ones detected in the Vela) are though to be a consequence of the superfluid component present in the interior of mature neutron stars. However strong entrainment challenges this picture. We study the impact of entrainment on the angular momentum that can be exchanged between the normal component and the superfluid during a glitch by means of a consistent global model. This allows to estimate the maximum angular momentum reservoir stored into the superfluid component of the star: the essential ingredient are newly calculated mesoscopic pinning forces that block the superfluid vorticity in the crust of the neutron star. This method can also provide a quantitative test for global models of rotating neutron stars, as well as for microphysical inputs present in literature (like entrainment parameters and pinning forces).