Discovery of a new extragalactic circular radio source with ASKAP : ORC J0102-2450

Barbel S. Koribalski; Ray P. Norris; Heinz Andernach; Lawrence Rudnick; Stanislav Shabala; Miroslav Filipović; Emil Lenc

doi:10.1093/mnrasl/slab041

Discovery of a new extragalactic circular radio source with ASKAP : ORC J0102-2450

Barbel S. Koribalski, Ray P. Norris, Heinz Andernach, Lawrence Rudnick, Stanislav Shabala, Miroslav Filipović, Emil Lenc

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

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.

Original language	English
Pages (from-to)	L11-L15
Number of pages	5
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	505
Issue number	1
DOIs	https://doi.org/10.1093/mnrasl/slab041
Publication status	Published - 1 Jul 2021

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© 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.

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title = "Discovery of a new extragalactic circular radio source with ASKAP : ORC J0102-2450",

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.",

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T1 - Discovery of a new extragalactic circular radio source with ASKAP : ORC J0102-2450

AU - Koribalski, Barbel S.

AU - Norris, Ray P.

AU - Andernach, Heinz

AU - Rudnick, Lawrence

AU - Shabala, Stanislav

AU - Filipović, Miroslav

AU - Lenc, Emil

PY - 2021/7/1

Y1 - 2021/7/1

N2 - 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.

AB - 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.

UR - https://hdl.handle.net/1959.7/uws:63318

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DO - 10.1093/mnrasl/slab041

M3 - Article

SN - 1745-3925

VL - 505

SP - L11-L15

JO - Monthly Notices of the Royal Astronomical Society: Letters

JF - Monthly Notices of the Royal Astronomical Society: Letters

IS - 1

ER -

Discovery of a new extragalactic circular radio source with ASKAP : ORC J0102-2450

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