Independent discovery of a nulling pulsar with unusual subpulse drifting properties with the Murchison Widefield Array

Samuel J. McSweeney; N. D. Ramesh Bhat; Nicholas A. Swainston; Keegan R. Smith; Sanjay Kudale; Paul Hancock; Willem van Straten; Shi Dai; Ryan M. Shannon; Steven J. Tingay; Melanie Johnston-Hollitt; David L. Kaplan; Mia Walker

doi:10.3847/1538-4357/ac75bc

Independent discovery of a nulling pulsar with unusual subpulse drifting properties with the Murchison Widefield Array

Samuel J. McSweeney, N. D. Ramesh Bhat, Nicholas A. Swainston, Keegan R. Smith, Sanjay Kudale, Paul Hancock, Willem van Straten, Shi Dai, Ryan M. Shannon, Steven J. Tingay, Melanie Johnston-Hollitt, David L. Kaplan, Mia Walker

Western Sydney University

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Abstract

We report the independent discovery of PSR J0026-1955 with the Murchison Widefield Array (MWA) in the ongoing Southern-sky MWA Rapid Two-metre pulsar survey. J0026-1955 has a period of ∼1.306 s, a dispersion measure of ∼20.869 pc cm-3, and a nulling fraction of ∼77%. This pulsar highlights the advantages of the survey's long dwell times (∼80 minutes), which, when fully searched, will be sensitive to the expected population of similarly bright, intermittent pulsars with long nulls. A single-pulse analysis in the MWA's 140-170 MHz band also reveals a complex subpulse drifting behavior, including both rapid changes of the drift rate characteristic of mode switching pulsars, as well as a slow, consistent evolution of the drift rate within modes. In some longer drift sequences, interruptions in the otherwise smooth drift rate evolution occur preferentially at a particular phase, typically lasting a few pulses. These properties make this pulsar an ideal test bed for prevailing models of drifting behavior such as the carousel model.

Original language	English
Article number	210
Number of pages	12
Journal	Astrophysical Journal
Volume	933
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/ac75bc
Publication status	Published - 2022

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© 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence (https://creativecommons.org/licenses/by/4.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI

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McSweeney, S. J., Bhat, N. D. R., Swainston, N. A., Smith, K. R., Kudale, S., Hancock, P., Straten, W. V., Dai, S., Shannon, R. M., Tingay, S. J., Johnston-Hollitt, M., Kaplan, D. L., & Walker, M. (2022). Independent discovery of a nulling pulsar with unusual subpulse drifting properties with the Murchison Widefield Array. Astrophysical Journal, 933(2), Article 210. https://doi.org/10.3847/1538-4357/ac75bc

@article{d695d87a88a84d13b3cb31b590614bc4,

title = "Independent discovery of a nulling pulsar with unusual subpulse drifting properties with the Murchison Widefield Array",

abstract = "We report the independent discovery of PSR J0026-1955 with the Murchison Widefield Array (MWA) in the ongoing Southern-sky MWA Rapid Two-metre pulsar survey. J0026-1955 has a period of ∼1.306 s, a dispersion measure of ∼20.869 pc cm-3, and a nulling fraction of ∼77%. This pulsar highlights the advantages of the survey's long dwell times (∼80 minutes), which, when fully searched, will be sensitive to the expected population of similarly bright, intermittent pulsars with long nulls. A single-pulse analysis in the MWA's 140-170 MHz band also reveals a complex subpulse drifting behavior, including both rapid changes of the drift rate characteristic of mode switching pulsars, as well as a slow, consistent evolution of the drift rate within modes. In some longer drift sequences, interruptions in the otherwise smooth drift rate evolution occur preferentially at a particular phase, typically lasting a few pulses. These properties make this pulsar an ideal test bed for prevailing models of drifting behavior such as the carousel model.",

author = "McSweeney, {Samuel J.} and Bhat, {N. D. Ramesh} and Swainston, {Nicholas A.} and Smith, {Keegan R.} and Sanjay Kudale and Paul Hancock and Straten, {Willem van} and Shi Dai and Shannon, {Ryan M.} and Tingay, {Steven J.} and Melanie Johnston-Hollitt and Kaplan, {David L.} and Mia Walker",

year = "2022",

doi = "10.3847/1538-4357/ac75bc",

language = "English",

volume = "933",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "Institute of Physics Publishing",

number = "2",

}

McSweeney, SJ, Bhat, NDR, Swainston, NA, Smith, KR, Kudale, S, Hancock, P, Straten, WV, Dai, S, Shannon, RM, Tingay, SJ, Johnston-Hollitt, M, Kaplan, DL & Walker, M 2022, 'Independent discovery of a nulling pulsar with unusual subpulse drifting properties with the Murchison Widefield Array', Astrophysical Journal, vol. 933, no. 2, 210. https://doi.org/10.3847/1538-4357/ac75bc

TY - JOUR

T1 - Independent discovery of a nulling pulsar with unusual subpulse drifting properties with the Murchison Widefield Array

AU - McSweeney, Samuel J.

AU - Bhat, N. D. Ramesh

AU - Swainston, Nicholas A.

AU - Smith, Keegan R.

AU - Kudale, Sanjay

AU - Hancock, Paul

AU - Straten, Willem van

AU - Dai, Shi

AU - Shannon, Ryan M.

AU - Tingay, Steven J.

AU - Johnston-Hollitt, Melanie

AU - Kaplan, David L.

AU - Walker, Mia

PY - 2022

Y1 - 2022

N2 - We report the independent discovery of PSR J0026-1955 with the Murchison Widefield Array (MWA) in the ongoing Southern-sky MWA Rapid Two-metre pulsar survey. J0026-1955 has a period of ∼1.306 s, a dispersion measure of ∼20.869 pc cm-3, and a nulling fraction of ∼77%. This pulsar highlights the advantages of the survey's long dwell times (∼80 minutes), which, when fully searched, will be sensitive to the expected population of similarly bright, intermittent pulsars with long nulls. A single-pulse analysis in the MWA's 140-170 MHz band also reveals a complex subpulse drifting behavior, including both rapid changes of the drift rate characteristic of mode switching pulsars, as well as a slow, consistent evolution of the drift rate within modes. In some longer drift sequences, interruptions in the otherwise smooth drift rate evolution occur preferentially at a particular phase, typically lasting a few pulses. These properties make this pulsar an ideal test bed for prevailing models of drifting behavior such as the carousel model.

AB - We report the independent discovery of PSR J0026-1955 with the Murchison Widefield Array (MWA) in the ongoing Southern-sky MWA Rapid Two-metre pulsar survey. J0026-1955 has a period of ∼1.306 s, a dispersion measure of ∼20.869 pc cm-3, and a nulling fraction of ∼77%. This pulsar highlights the advantages of the survey's long dwell times (∼80 minutes), which, when fully searched, will be sensitive to the expected population of similarly bright, intermittent pulsars with long nulls. A single-pulse analysis in the MWA's 140-170 MHz band also reveals a complex subpulse drifting behavior, including both rapid changes of the drift rate characteristic of mode switching pulsars, as well as a slow, consistent evolution of the drift rate within modes. In some longer drift sequences, interruptions in the otherwise smooth drift rate evolution occur preferentially at a particular phase, typically lasting a few pulses. These properties make this pulsar an ideal test bed for prevailing models of drifting behavior such as the carousel model.

UR - https://hdl.handle.net/1959.7/uws:68415

U2 - 10.3847/1538-4357/ac75bc

DO - 10.3847/1538-4357/ac75bc

M3 - Article

SN - 0004-637X

VL - 933

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 210

ER -

Independent discovery of a nulling pulsar with unusual subpulse drifting properties with the Murchison Widefield Array

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