Discovery of the anti-glitch in PSR J1835$-$1106

Abstract

We report the detection of an anti-glitch with a fractional frequency change of $\Delta \nu /\nu =-3.46(6)\times 10^{-9}$ in the rotation-powered pulsar PSR J1835$-$1106 at MJD 55813, based on timing observations collected with the Nanshan 26-m and Parkes 64-m radio telescopes from January 2000 to July 2022. A comparison of the average pulse profiles within $\pm 300$ d of the event reveals no significant morphological changes. We also estimate the angular velocity lag between the normal and superfluid components at the time of the glitch, showing that one of the superfluid glitch models is incompatible with PSR J1835$-$1106 due to its insufficient spin-down rate and angular velocity lag. The wind braking scenario offers a viable alternative, consistent with the observed spin-down behavior, glitch amplitude, and post-glitch recovery. High-cadence, high-sensitivity monitoring of similar events is essential to distinguish between internal (superfluid) and external (wind-related) glitch mechanisms.

7 pages, 2 figures, 3 tables, version accepted for publication in ApJL

References in corpus (12)

• TEMPO2, a new pulsar timing package. I: Overview
• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• Tempo2, a new pulsar timing package. II: The timing model and precision estimates
• The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
• An ultra-wide bandwidth (704 to 4032 MHz) receiver for the Parkes radio telescope
• Detection of 107 glitches in 36 southern pulsars
• A glitch and an anti-glitch in the anomalous X-ray pulsar 1E 1841-045
• A radiatively-quiet glitch and anti-glitch in the magnetar 1E 2259+586
• Anti-glitches within the standard scenario of pulsar glitches
• Discovery of the first anti-glitch event in the rotation-powered pulsar PSR B0540-69
• Measuring glitch recoveries and braking indices with Bayesian model selection
• On the connection between radiative outbursts and timing irregularities in magnetars