Timing results of 22 years for PSR J0922+0638

Abstract

We conducted a timing analysis of PSR J0922+0638 (B0919+06) using data from the Nanshan 26 m radio telescope and the MeerKAT telescope, spanning from January 2001 to March 2023. During this 22-year period, we discovered a previously unreported small glitch (glitch 1) before the well-known large glitch (glitch 2), occurring at $\mathrm{MJD}\sim 53325(3)$, with a frequency jump amplitude of $\Delta \nu /\nu \sim 0.79(6)\times 10^{-9}$. We also identified ten slow glitch events, half of which were newly detected. These slow glitches occurred quasi-periodically, with an average interval of approximately 553(21) days, fractional frequency changes ranging from $\Delta \nu /\nu \sim 1.13(1)\times 10^{-9}$ to $4.08(5)\times 10^{-9}$, and a maximum fractional change in the first derivative of the frequency of $\Delta \dot{\nu }/\dot{\nu }\sim -4.6\times 10^{-3}$. Additionally, our timing noise analysis reveals a change in the spectral index for noise power before and after glitch 2, with values of $-6.0$ and $-5.3$, respectively, likely due to this large glitch. Throughout the entire observation period, the first derivative of the spin frequency ($\dot{\nu }$) showed a periodic structure. The possible modulation period was estimated to be 537(24) days before the 700-day data gap at MJD 56716 and 600(58) days afterward. We discuss the periodic oscillations in pulsar rotation as a possible manifestation of spin-down noise and quasi-periodic slow glitches.

arXiv comment14 pages, 8 figures, 4 tables, ApJ (2025) accepted

References in corpus (45)

• 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
• Switched magnetospheric regulation of pulsar spin-down
• The Parkes Pulsar Timing Array Project
• Models of Pulsar Glitches
• An analysis of the timing irregularities for 366 pulsars
• Detection of 107 glitches in 36 southern pulsars
• TempoNest: A Bayesian approach to pulsar timing analysis
• The glitch-induced identity changes of PSR J1119-6127
• The MeerKAT Telescope as a Pulsar Facility: System verification and early science results from MeerTime
• Pulsar timing analysis in the presence of correlated noise
• An Anti-Glitch in a Magnetar
• Timing of young radio pulsars I: Timing noise, periodic modulation and proper motion
• Proper-Motion Measurements with the VLA. II. Observations of Twenty-eight Pulsars
• Precession of the Isolated Neutron Star PSR B1828-11
• Pulsar Timing at Urumqi Astronomical Observatory: Observing System and Results
• A connection between radio state changing and glitch activity in PSR J0742-2822
• Pulsar Observations Using the First Station of the Long Wavelength Array and the LWA Pulsar Data Archive
• The Thousand-Pulsar-Array programme on MeerKAT I: Science objectives and first results
• Neutron star glitches have a substantial minimum size
• Bistable Profile Illumination in Pulsars B0919+06 & B1859+07
• Timing Observations of 27 Pulsars at the Pushchino Observatory from 1978 to 2012
• Unusual glitch behaviours of two young pulsars
• Mode switching and oscillations in PSR B1828-11
• Understanding the spin-down rate changes of PSR B0919+06
• The Spin-down State Change and Mode Change Associated with Glitch Activity of PSR B2035+36
• Pulsar slow glitches in a solid quark star model
• Quasi-Periodicities in the Anomalous Emission Events in Pulsars B1859+07 and B0919+06
• Characterising the rotational irregularities of the Vela pulsar from 21 yr of phase-coherent timing
• A new X-ray look into four old pulsars
• Stochastic processes for pulsar timing noise: fluctuations in the internal and external torques
• Jiamusi Pulsar Observations: I. Abnormal emission events of PSR B0919+06
• Evidence for chaotic behaviour in pulsar spin-down rates
• The slow rise and recovery of the 2019 Crab pulsar glitch
• Slow glitches in the pulsar B1822-09
• New pulse profile variability associated with a glitch of PSR J0738-4042
• Nature of cyclical changes in the timing residuals from the pulsar B1642-03
• The Thousand-Pulsar-Array programme on MeerKAT II: observing strategy for pulsar monitoring with subarrays
• Cyclical Changes in the Timing Residuals from the Pulsar B0919+06
• Glitch-induced pulse profile change of PSR J0742-2822 observed from the IAR
• Multi-frequency study of the peculiar pulsars PSR B0919+06 and PSR B1859+07
• Pulse profile variability associated with the glitch of PSR J1048$-$5832
• The TRAPUM Small Magellanic Cloud pulsar survey with MeerKAT: I. Discovery of seven new pulsars and two Pulsar Wind Nebula associations
• Multifrequency behaviour of the anomalous events of PSR J0922+0638