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Accepted manuscript

Fast as Potoroo: Radio Continuum Detection of a Bow-Shock Pulsar Wind Nebula Powered by Pulsar J1638–4713

Published online by Cambridge University Press:  25 March 2024

Sanja Lazarević Open the ORCID record for Sanja Lazarević [Opens in a new window] ,
Miroslav D. Filipović ,
Shi Dai ,
Roland Kothes ,
Adeel Ahmad ,
Rami Z. E. Alsaberi ,
Joel C. F. Balzan ,
Luke A. Barnes Open the ORCID record for Luke A. Barnes [Opens in a new window] ,
William D. Cotton  and
Philip G. Edwards
...Show all authors
Sanja Lazarević*
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia CSIRO Space and Astronomy, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia Astronomical Observatory, Volgina 7, 11060 Belgrade, Serbia
Miroslav D. Filipović
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia
Shi Dai
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia
Roland Kothes
Affiliation:
Dominion Radio Astrophysical Observatory, Herzberg Astronomy and Astrophysics, National Research Council Canada, PO Box 248, Penticton, BC V2A 6J9, Canada
Adeel Ahmad
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia
Rami Z. E. Alsaberi
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia
Joel C. F. Balzan
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia
Luke A. Barnes
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia
William D. Cotton
Affiliation:
National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA South African Radio Astronomy Observatory, 2 Fir Street, Black River Park, Observatory, Cape Town 7925, South Africa
Philip G. Edwards
Affiliation:
CSIRO Space and Astronomy, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia
Yjan A. Gordon
Affiliation:
Department of Physics, University of Wisconsin-Madison, 1150 University Ave, Madison, WI 53706, USA
Frank Haberl
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, Gießenbachstraße 1, D-85748 Garching, Germany
Andrew M. Hopkins
Affiliation:
Australian Astronomical Optics, Macquarie University, 105 Delhi Rd, North Ryde, NSW 2113, Australia
Bärbel S. Koribalski
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia CSIRO Space and Astronomy, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia
Denis Leahy
Affiliation:
Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, T2N 1N4, Canada
Chandreyee Maitra
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, Gießenbachstraße 1, D-85748 Garching, Germany
Marko Mićić
Affiliation:
Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35401, USA
Gavin Rowell
Affiliation:
School of Physical Sciences, The University of Adelaide, Adelaide 5005, Australia
Manami Sasaki
Affiliation:
Dr Karl Remeis Observatory, Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Sternwartstraße 7, 96049, Bamberg, Germany
Nicholas F. H. Tothill
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia
Grazia Umana
Affiliation:
INAF – Osservatorio Astrofisico di Catania, Via S. Sofia 78, I-95123, Catania, Italy
Velibor Velović
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia
*
Author for correspondence: S. Lazarević, Email: s.lazarevic@westernsydney.edu.au.
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Abstract

We report the discovery of a bow-shock pulsar wind nebula (PWN), named Potoroo, and the detection of a young pulsar J1638–4713 that powers the nebula. We present a radio continuum study of the PWN based on 20-cm observations obtained from the Australian Square Kilometre Array Pathfinder (ASKAP) and MeerKAT. PSR J1638–4713 was identified using Parkes radio telescope observations at frequencies above 3 GHz. The pulsar has the second-highest dispersion measure of all known radio pulsars (1553 pc cm–3), a spin period of 65.74 ms and a spin-down luminosity of Ė = 6.1 × 1036 erg s–1. The PWN has a cometary morphology and one of the greatest projected lengths among all the observed pulsar radio tails, measuring over 21 pc for an assumed distance of 10 kpc. The remarkably long tail and atypically steep radio spectral index are attributed to the interplay of a supernova reverse shock and the PWN. The originating supernova remnant is not known so far. We estimated the pulsar kick velocity to be in the range of 1000 – 2000 km s–1 for ages between 23 and 10 kyr. The X-ray counterpart found in Chandra data, CXOU J163802.6–471358, shows the same tail morphology as the radio source but is shorter by a factor of 10. The peak of the X-ray emission is offset from the peak of the radio total intensity (Stokes I) emission by approximately 4.7”, but coincides well with circularly polarised (Stokes V) emission. No infrared counterpart was found.

Keywords

ISM: individual (Potoroo)pulsars: individual (PSR J1638–4713)radio continuum: ISMX-rays: individual (CXOU J163802.6–471358)stars: winds, outflowsradiation mechanism: non-thermal
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Accepted manuscript , pp. 1 - 16
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of the Astronomical Society of Australia

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