The slow rise and recovery of the 2019 Crab pulsar glitch

Abstract

We present updated measurements of the Crab pulsar glitch of 2019 July 23 using a dataset of pulse arrival times spanning $\sim$5 months. On MJD 58687, the pulsar underwent its seventh largest glitch observed to date, characterised by an instantaneous spin-up of $\sim$1 $\mu$Hz. Following the glitch the pulsar's rotation frequency relaxed exponentially towards pre-glitch values over a timescale of approximately one week, resulting in a permanent frequency increment of $\sim$0.5 $\mu$Hz. Due to our semi-continuous monitoring of the Crab pulsar, we were able to partially resolve a fraction of the total spin-up. This delayed spin-up occurred exponentially over a timescale of $\sim$18 hours. This is the sixth Crab pulsar glitch for which part of the initial rise was resolved in time and this phenomenon has not been observed in any other glitching pulsars, offering a unique opportunity to study the microphysical processes governing interactions between the neutron star interior and the crust.

arXiv comment5 pages, 3 figures

References in corpus (18)

• TEMPO2, a new pulsar timing package. I: Overview
• A study of 315 glitches in the rotation of 102 pulsars
• Models of Pulsar Glitches
• 45 Years of Rotation of the Crab Pulsar
• Detection of 107 glitches in 36 southern pulsars
• TempoNest: A Bayesian approach to pulsar timing analysis
• Avalanche dynamics of radio pulsar glitches
• High time resolution observations of the January 2000 glitch in the Vela pulsar
• Observations of a Series of Six Recent Glitches in the Crab Pulsar
• The largest glitch observed in the Crab pulsar
• Two decades of pulsar timing of Vela
• Simulations of Glitches in Isolated Pulsars
• Glitch rises as a test for rapid superfluid coupling in neutron stars
• Vortex pinning in the superfluid core of neutron stars and the rise of pulsar glitches
• Core and crust contributions in pulsar glitches: constraints from the slow rise of the largest glitch observed in the Crab pulsar
• Modelling pulsar glitches: the hydrodynamics of superfluid vortex avalanches in neutron stars
• The Largest Crab Glitch and the Vortex Creep Model
• Discovery of delayed spin-up behavior following two large glitches in the Crab pulsar, and the statistics of such processes

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• X-ray polarimetry of the Crab nebula with PolarLight: polarization recovery after the glitch and a secular position angle variation
• Prospects for detecting transient quasi-monochromatic gravitational waves from glitching pulsars with current and future detectors
• The Radio Parallax of the Crab Pulsar: A First VLBI Measurement Calibrated with Giant Pulses
• Rotational and radio emission properties of PSR J0738-4042 over half a century
• Measuring glitch recoveries and braking indices with Bayesian model selection
• High priority targets for transient gravitational waves from glitching pulsars
• The ORT and the uGMRT Pulsar Monitoring Program : Pulsar Timing Irregularities & the Gaussian Process Realization
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