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Discovery of a new extragalactic circular radio source with ASKAP: ORC J0102-2450
Citation
Koribalski, BS and Norris, RP and Andernach, H and Rudnick, L and Shabala, SS and Filipovic, M and Lenc, E, Discovery of a new extragalactic circular radio source with ASKAP: ORC J0102-2450, Monthly Notices of the Royal Astronomical Society, 505, (1) pp. L11-L15. ISSN 1745-3925 (2021) [Refereed Article]
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Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society ©: 2021 the authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
DOI: doi:10.1093/mnrasl/slab041
Abstract
We present the discovery of another odd radio circle (ORC) with the Australian Square Kilometre Array Pathfinder (ASKAP) at 944 MHz. The observed radio ring, ORC J0102-2450, has a diameter of ∼70 arcsec or 300 kpc, if associated with the central elliptical galaxy DES J010224.33-245039.5 (𝓏 ∼ 0.27). Considering the overall radio morphology (circular ring and core) and lack of ring emission at non-radio wavelengths, we investigate if ORC J0102–2450 could be the relic lobe of a giant radio galaxy seen end on or the result of a giant blast wave. We also explore possible interaction scenarios, for example, with the companion galaxy, DES J010226.15-245104.9, located in or projected on to the south-eastern part of the ring. We encourage the search for further ORCs in radio surveys to study their properties and origin.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | radio continuum: galaxies |
| Research Division: | Physical Sciences |
| Research Group: | Astronomical sciences |
| Research Field: | Cosmology and extragalactic astronomy |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in the physical sciences |
| UTAS Author: | Shabala, SS (Associate Professor Stas Shabala) |
| ID Code: | 145549 |
| Year Published: | 2021 |
| Web of Science® Times Cited: | 5 |
| Deposited By: | Physics |
| Deposited On: | 2021-07-26 |
| Last Modified: | 2021-09-22 |
| Downloads: | 9 View Download Statistics |
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