# Delayed spin-up and persistent shift phenomena of Crab pulsar glitches: two sides of the same coin?

## TL;DR

This study analyzes 45 years of radio data on the Crab pulsar's glitches, revealing that delayed spin-up and persistent shifts are likely linked phenomena, offering insights into neutron star interior physics.

## Contribution

It presents a statistical analysis showing that delayed spin-up and persistent shifts are correlated and may share a common physical origin, using power law fits to observational data.

## Key findings

- Power law functions fit the timescales well
- Linear correlation between persistent shift and delayed spin-up
- Potential new probe of neutron star interior physics

## Abstract

Pulsar glitches are sudden increase in their spin frequency, in most cases followed by the long timescale recovery process. As of this writing, about 546 glitches have been reported in 188 pulsars, the Crab pulsar is a special one with unique manifestations. This writing presents a statistic study on post-glitch observables of the Crab pulsar, especially the delayed spin-up in post-glitch phase and persistent shift in the slow-down rate of the star. By analyzing the radio data over 45 years, we find that two power law functions respectively fit the persistent shift and delayed spin-up timescales versus glitch size well, and we find a linear correlation between the persistent shift and delayed spin-up timescale from the consistency of the two fitting functions, probably indicating their same physical origin and may provide a new probe of interior physics of neutron stars.