Hostname: page-component-54dcc4c588-r5qjk Total loading time: 0 Render date: 2025-10-08T10:05:42.401Z Has data issue: false hasContentIssue false
  • English
  • Français
Accepted manuscript

Ultra-Wideband Polarimetry of the April 2021 Profile Change Event in PSR J1713+0747

Published online by Cambridge University Press:  08 October 2025

Rami F. Mandow Open the ORCID record for Rami F. Mandow [Opens in a new window] ,
Andrew Zic ,
J. R. Dawson Open the ORCID record for J. R. Dawson [Opens in a new window] ,
Shuangqiang Wang ,
Małgorzata Curyło ,
Shi Dai ,
Valentina Di Marco ,
George Hobbs Open the ORCID record for George Hobbs [Opens in a new window] ,
Vivek Gupta  and
Agastya Kapur
...Show all authors
Rami F. Mandow*
Affiliation:
Department of Mathematics and Physical Sciences, Macquarie University, NSW 2109, Australia Australia Telescope National Facility, CSIRO, Space and Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Andrew Zic
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, P.O. Box 76, Epping, NSW 1710, Australia OzGrav: The ARC Center of Excellence for Gravitational Wave Discovery, Hawthorn VIC 3122, Australia
J. R. Dawson
Affiliation:
Department of Mathematics and Physical Sciences, Macquarie University, NSW 2109, Australia Australia Telescope National Facility, CSIRO, Space and Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Shuangqiang Wang
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, P.O. Box 76, Epping, NSW 1710, Australia Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, People’s Republic of China
Małgorzata Curyło
Affiliation:
School of Physics and Astronomy, Monash University, Clayton VIC 3800, Australia OzGrav: The ARC Center of Excellence for Gravitational Wave Discovery, Clayton VIC 3800, Australia
Shi Dai
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Valentina Di Marco
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, P.O. Box 76, Epping, NSW 1710, Australia School of Physics and Astronomy, Monash University, Clayton VIC 3800, Australia OzGrav: The ARC Center of Excellence for Gravitational Wave Discovery, Clayton VIC 3800, Australia
George Hobbs
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Vivek Gupta
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Agastya Kapur
Affiliation:
Department of Mathematics and Physical Sciences, Macquarie University, NSW 2109, Australia Australia Telescope National Facility, CSIRO, Space and Astronomy, P.O. Box 76, Epping, NSW 1710, Australia CSIRO Data61, Marsfield, NSW 2122, Australia
M. Kerr
Affiliation:
Space Science Division, Naval Research Laboratory, Washington, DC 20375–5352, USA
Marcus E. Lower
Affiliation:
Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia
Saurav Mishra
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, P.O. Box 76, Epping, NSW 1710, Australia OzGrav: The ARC Center of Excellence for Gravitational Wave Discovery, Hawthorn VIC 3122, Australia Centre for Astrophysics and Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122, Australia
Daniel Reardon
Affiliation:
OzGrav: The ARC Center of Excellence for Gravitational Wave Discovery, Hawthorn VIC 3122, Australia Centre for Astrophysics and Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122, Australia
Christopher J. Russell
Affiliation:
CSIRO Scientific Computing, Australian Technology Park, Locked Bag 9013, Alexandria, NSW 1435, Australia
Ryan M. Shannon
Affiliation:
OzGrav: The ARC Center of Excellence for Gravitational Wave Discovery, Hawthorn VIC 3122, Australia Centre for Astrophysics and Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122, Australia
Lei Zhang
Affiliation:
Centre for Astrophysics and Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122, Australia National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100101, People’s Republic of China
Xingjiang Zhu
Affiliation:
Department of Physics, Faculty of Arts and Sciences, Beijing Normal University, Zhuhai 519087, China
*
Author for correspondence: Rami F. Mandow, Email: rami.mandow@hdr.mq.edu.au.
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The millisecond pulsar PSR J1713+0747 is a high-priority target for pulsar timing array experiments due to its long-term timing stability, and bright, narrow pulse profile. In April 2021, PSR J1713+0747 underwent a significant profile change event, observed by several telescopes worldwide. Using the broad bandwidth and polarimetric fidelity of the Ultra-Wideband Low-frequency receiver on Murriyang, CSIRO’s Parkes radio telescope, we investigated the long-term spectro-polarimetric behaviour of this profile change in detail. We highlight the broad-bandwidth nature of the event, which exhibits frequency dependence that is inconsistent with cold-plasma propagation effects. We also find that spectral and temporal variations are stronger in one of the orthogonal polarisation modes than the other, and observe mild variations (∼ 3 – 5 σ significance) in circular polarisation above 1400MHz following the event. However, the linear polarisation position angle remained remarkably stable in the profile leading edge throughout the event. With over three years of data post-event, we find that the profile has not yet recovered back to its original state, indicating a long-term asymptotic recovery, or a potential reconfiguration of the pulsar’s magnetic field. These findings favour a magnetospheric origin of the profile change event over a line-of-sight propagation effect in the interstellar medium.

Keywords

generalpulsars: Individual: PSR J1713+0747magnetic fields

Information

Type
Research Article
Information
Publications of the Astronomical Society of Australia , Accepted manuscript , pp. 1 - 20
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of Astronomical Society of Australia