Discovery and follow-up of a quasiperiodically nulling and sub-pulse drifting pulsar with the Murchison Widefield Array

Abstract

The phenomenon of pulsar nulling, where pulsars temporarily and stochastically cease their radio emission, is thought to be indicative of a `dying' pulsar, where radio emission ceases entirely. Here we report the discovery of a long-period pulsar, PSR J0452-3418, from the ongoing Southern-sky MWA Rapid Two-meter (SMART) pulsar survey. The pulsar has a rotation period of $\sim$1.67\,s and a dispersion measure of 19.8\,\dmu, and it exhibits both quasi-periodic nulling and sub-pulse drifting. Periodic nulling is uncommon, only reported in $<1$\% of the pulsar population, with even a smaller fraction showing periodic nulling and sub-pulse drifting. We describe the discovery and follow-up of the pulsar, including a positional determination using high-resolution imaging with the upgraded Giant Metrewave Radio Telescope (uGMRT), initial timing analysis using the combination of MWA and uGMRT data, and detailed characterisation of the nulling and drifting properties in the MWA's frequency band (140-170\,MHz). Our analysis suggests a nulling fraction of 34$\pm 6$\% and a nulling periodicity of 42${}_{-1.3}^{+1.5}$ pulses. We measure the phase ($P_2$) and time modulation ($P_3$) caused by the sub-pulse drifting, with an average $P_2$ of 7.1${}_{-3.1}^{+26.3}$ degrees and a $P_3$ of 4.8${}_{-0.9}^{+1.5}$ pulses. We compare and contrast the observed properties with those of other pulsars that exhibit sub-pulse drifting and quasi-periodic nulling phenomena, and find that the majority of these objects tend to be in the `death valley' in the period-period derivative ($P$-$\dot{P}$) diagram. We also discuss some broader implications for pulsar emission physics and the detectability of similar objects using next-generation pulsar surveys.

arXiv comment16 pages, 9 Figures, 4 Tables, Accepted for ApJ***

References in corpus (39)

• The Murchison Widefield Array: the Square Kilometre Array Precursor at low radio frequencies
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• Faraday Rotation Measure Synthesis
• Pulsar Nulling and Mode Changing
• The subpulse modulation properties of pulsars at 21 cm
• The Phase II Murchison Widefield Array: Design Overview
• The Westerbork SINGS Survey II. Polarization, Faraday Rotation, and Magnetic Fields
• Radio Pulsar Death Line Revisited: Is PSR J2144-3933 Anomalous?
• Pulsar Rotation Measures and Large-scale Magnetic Field Reversals in the Galactic Disk
• Drifting Sub-Pulse Analysis Using the Two-Dimensional Fourier Transform
• The LOFAR Tied-Array All-Sky Survey (LOTAAS): Survey overview and initial pulsar discoveries
• Optimal periodicity searching: Revisiting the Fast Folding Algorithm for large-scale pulsar surveys
• Meterwavelength Single-pulse Polarimetric Emission Survey II: The phenomenon of Drifting Subpulses
• New Limits on Radio Emission from X-ray Dim Isolated Neutron Stars
• The CHIME Pulsar Project: System Overview
• Deep Analyses of Nulling in Arecibo Pulsars Reveal Further Periodic Behavior
• Classification of Subpulse Drifting in Pulsars
• Meterwavelength Single-pulse Polarimetric Emission Survey III: The Phenomenon of Nulling in Pulsars
• Low Frequency Observations of the Subpulse Drifter PSR J0034-0721 with the Murchison Widefield Array
• Investigation of nulling and subpulse drifting properties of PSR J1727$-$2739
• Periodic Modulation : Newly emergent emission behaviour in Pulsars
• Subpulse Drifting, Nulling and Mode changing in PSR J1822$-$2256
• The Mode Switching in Pulsar J1326$-$6700
• Subpulse Drifting, Nulling and Mode changing in PSR J2006$-$0807 with Core emission
• Time-domain and spectral properties of pulsars at 154 MHz
• Mode changing, subpulse drifting and nulling in four component conal pulsar PSR J2321+6024
• Radio Pulsar Sub-Populations (I) : The Curious Case of Nulling Pulsars
• Observations of Low-Frequency Radio Emission from Millisecond Pulsars and Multipath Propagation in the Interstellar Medium
• A Statistical Analysis of the Nulling Pulsar Population
• A Gaussian Mixture Model for Nulling Pulsars
• Simultaneous multi-frequency single pulse observations of pulsars
• A Pilot Study of Nulling in 22 Pulsars Using Mixture Modeling
• The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey -- I. Survey design and processing pipeline
• Discovery of a steep-spectrum low-luminosity pulsar with the Murchison Widefield Array
• MWA Tied-Array Processing II: Polarimetric Verification and Analysis of two Bright Southern Pulsars
• The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey -- II. Survey status, pulsar census, and first pulsar discoveries
• Detection of giant pulses in PSR J1047-6709
• The Discovery of Nulling and Mode Switching Pulsars with CHIME/Pulsar
• MWA Tied-Array Processing IV: A Multi-Pixel Beamformer for Pulsar Surveys and Ionospheric Corrected Localisation

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