Mysterious odd radio circle near the large magellanic cloud – an intergalactic supernova remnant?
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- Miroslav D Filipović
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- J L Payne
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- R Z E Alsaberi
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- R P Norris
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- P J Macgregor
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- L Rudnick
- Minnesota Institute for Astrophysics, School of Physics and Astronomy, University of Minnesota , 116 Church Street SE, Minneapolis, MN 55455, USA
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- B S Koribalski
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- D Leahy
- Department of Physics and Astronomy, University of Calgary , University of Calgary, Calgary, Alberta, T2N 1N4, Canada
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- L Ducci
- Institut für Astronomie und Astrophysik, Kepler Center for Astro and Particle Physics, Universität Tübingen , Sand 1, D-72076 Tübingen, Germany
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- R Kothes
- Dominion Radio Astrophysical Observatory, Herzberg Astronomy and Astrophysics, National Research Council Canada , PO Box 248, Penticton, BC V2A 6J9, Canada
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- H Andernach
- Departamento de Astronomía, DCNE, Universidad de Guanajuato, Cjón , de Jalisco s/n, Col. Valenciana, Guanajuato CP 36023, Gto., Mexico
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- L Barnes
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- I S Bojičić
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- L M Bozzetto
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- R Brose
- Dublin Institute for Advanced Studies, Astronomy & Astrophysics Section , 31 Fitzwilliam Place, D02 XF86 Dublin 2, Ireland
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- J D Collier
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- E J Crawford
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- R M Crocker
- Research School of Astronomy and Astrophysics, Australian National University , Canberra 2611, ACT, Australia
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- S Dai
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- T J Galvin
- International Centre for Radio Astronomy Research, Curtin University , Bentley, WA 6102, Australia
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- F Haberl
- Max-Planck-Institut für extraterrestrische Physik , Gießenbachstraße 1, D-85748 Garching, Germany
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- U Heber
- Remeis Observatory and ECAP, Universität Erlangen-Nürnberg , Sternwartstraße 7, D-96049 Bamberg, Germany
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- T Hill
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- A M Hopkins
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- N Hurley-Walker
- International Centre for Radio Astronomy Research, Curtin University , Bentley, WA 6102, Australia
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- A Ingallinera
- INAF – Osservatorio Astrofisico di Catania , via Santa Sofia 78, I-95123 Catania, Italia
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- T Jarrett
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- P J Kavanagh
- School of Cosmic Physics, Dublin Institute for Advanced Studies , 31 Fitzwilliam Place, Dublin 2, Ireland
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- E Lenc
- CSIRO Space & Astronomy , PO Box 76, Epping, NSW 1710, Australia
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- K J Luken
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- D Mackey
- Research School of Astronomy and Astrophysics, Australian National University , Canberra 2611, ACT, Australia
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- P Manojlović
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- P Maggi
- Observatoire Astronomique de Strasbourg, Université de Strasbourg , CNRS, 11 rue de l’Université, F-67000 Strasbourg, France
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- C Maitra
- Max-Planck-Institut für extraterrestrische Physik , Gießenbachstraße 1, D-85748 Garching, Germany
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- C M Pennock
- Lennard-Jones Laboratories, Keele University , Staffordshire ST5 5BG, UK
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- S Points
- Cerro Tololo Inter-American Observatory/NSF’s NOIRLab , Casilla 603, La Serena, Chile
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- S Riggi
- INAF – Osservatorio Astrofisico di Catania , via Santa Sofia 78, I-95123 Catania, Italia
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- G Rowell
- School of Physical Sciences, The University of Adelaide , Adelaide 5005, Australia
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- S Safi-Harb
- Department of Physics and Astronomy, University of Manitoba , Winnipeg, MB R3T 2N2, Canada
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- H Sano
- National Astronomical Observatory of Japan , Mitaka, Tokyo 181-8588, Japan
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- M Sasaki
- Remeis Observatory and ECAP, Universität Erlangen-Nürnberg , Sternwartstraße 7, D-96049 Bamberg, Germany
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- S Shabala
- School of Natural Sciences, University of Tasmania , Private Bag 37, Hobart 7001, Australia
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- J Stevens
- CSIRO Space & Astronomy , PO Box 76, Epping, NSW 1710, Australia
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- J Th van Loon
- Lennard-Jones Laboratories, Keele University , Staffordshire ST5 5BG, UK
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- N F H Tothill
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- G Umana
- INAF – Osservatorio Astrofisico di Catania , via Santa Sofia 78, I-95123 Catania, Italia
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- D Urošević
- Department of Astronomy, Faculty of Mathematics, University of Belgrade , Studentski trg 16, 11000 Belgrade, Serbia
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- V Velović
- School of Science, Western Sydney University , Locked Bag 1797, Penrith South DC, NSW 2751, Australia
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- T Vernstrom
- CSIRO Space & Astronomy , PO Box 76, Epping, NSW 1710, Australia
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- J L West
- Dunlap Institute for Astronomy and Astrophysics, University of Toronto , Toronto, ON M5S 3H4, Canada
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- Z Wan
- Sydney Institute for Astronomy, School of Physics, The University of Sydney , Sydney, New South Wales, Australia
抄録
<jats:title>ABSTRACT</jats:title> <jats:p>We report the discovery of J0624–6948, a low-surface brightness radio ring, lying between the Galactic Plane and the large magellanic cloud (LMC). It was first detected at 888 MHz with the Australian Square Kilometre Array Pathfinder (ASKAP), and with a diameter of ∼196 arcsec. This source has phenomenological similarities to odd radio circles (ORCs). Significant differences to the known ORCs – a flatter radio spectral index, the lack of a prominent central galaxy as a possible host, and larger apparent size – suggest that J0624–6948 may be a different type of object. We argue that the most plausible explanation for J0624–6948 is an intergalactic supernova remnant due to a star that resided in the LMC outskirts that had undergone a single-degenerate type Ia supernova, and we are seeing its remnant expand into a rarefied, intergalactic environment. We also examine if a massive star or a white dwarf binary ejected from either galaxy could be the supernova progenitor. Finally, we consider several other hypotheses for the nature of the object, including the jets of an active galactic nucleus (30Dor) or the remnant of a nearby stellar super-flare.</jats:p>
収録刊行物
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- Monthly Notices of the Royal Astronomical Society
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Monthly Notices of the Royal Astronomical Society 512 (1), 265-284, 2022-02-04
Oxford University Press (OUP)