Observed glitches in 8 young pulsars

TL;DR

This study reports eleven pulsar glitches observed with high cadence radio telescopes, including three new glitches, and reanalyzes a major glitch in the Crab pulsar with a new model, providing insights into glitch recovery behaviors.

Contribution

The paper presents the first detection of three new pulsar glitches and introduces a new phenomenological model for analyzing post-glitch recovery in pulsars.

Findings

Detected 11 glitches in 8 pulsars with amplitudes from 10^{-6} to 10^{-9}

Reanalyzed Crab pulsar glitch with a new model including slow rise

Reported the largest glitch in PSR J1731-4744 to date

Abstract

The abrupt change in the pulse period of a pulsar is called a pulsar glitch. In this paper, we present eleven pulsar glitches detected using the Ooty Radio Telescope (ORT) and the upgraded Giant Metrewave Radio Telescope (uGMRT) in high cadence timing observations of 8 pulsars. The measured relative amplitude of glitches ($\Delta \nu/\nu$) from our data ranges from $10^{-6}$ to $10^{-9}$. Among these glitches, three are new discoveries, being reported for the first time. We also reanalyze the largest pulsar glitch in the Crab pulsar (PSR J0534+2200) by fitting the ORT data to a new phenomenological model including the slow rise in the post-glitch evolution. We measure an exponential recovery of 30 days after the Vela glitch detected on MJD 57734 with a healing factor $Q=5.8\times 10^{-3}$. Further, we report the largest glitch ($\Delta \nu/\nu = 3147.9 \times 10^{-9}$) so far in PSR J1731$-$4744.