2022MNRAS.513.1300N

Query : 2022MNRAS.513.1300N

2022MNRAS.513.1300N - Mon. Not. R. Astron. Soc., 513, 1300-1316 (2022/June-2)

MeerKAT uncovers the physics of an odd radio circle.

NORRIS R.P., COLLIER J.D., CROCKER R.M., HEYWOOD I., MACGREGOR P., RUDNICK L., SHABALA S., ANDERNACH H., DA CUNHA E., ENGLISH J., FILIPOVIC M., KORIBALSKI B.S., LUKEN K., ROBOTHAM A., SEKHAR S., THORNE J.E. and VERNSTROM T.

Abstract (from CDS):

Odd radio circles (ORCs) are recently-discovered faint diffuse circles of radio emission, of unknown cause, surrounding galaxies at moderate redshift (z ∼ 0.2 - 0.6). Here, we present detailed new MeerKAT radio images at 1284 MHz of the first ORC, originally discovered with the Australian Square Kilometre Array Pathfinder, with higher resolution (6 arcsec) and sensitivity (∼ 2.4 µJy/beam). In addition to the new images, which reveal a complex internal structure consisting of multiple arcs, we also present polarization and spectral index maps. Based on these new data, we consider potential mechanisms that may generate the ORCs.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: general - radio continuum: galaxies

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 2MASS J01022435-2450396 G 01 02 24.35496 -24 50 39.6132           ~ 3 0
2 ORC J0102-2450 Rad 01 02 24.50 -24 50 38.1           ~ 14 0
3 SN 1987A SN* 05 35 27.98840 -69 16 11.1134           SNIIpec 5203 2
4 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
5 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
6 NVSS J155524+272629 rG 15 55 24.63242 +27 26 34.3850           ~ 5 0
7 ORC J1555+2726 Rad 15 55 24.65 +27 26 33.8           ~ 17 1
8 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
9 NGC 6935 EmG 20 38 20.1988150992 -52 06 37.891816812   12.77 12.10 11.57   ~ 72 0
10 ORC J2058-5736a Rad 20 58 42.80 -57 36 58.0           ~ 10 0
11 ORC J2058-5736b Rad 20 58 56.30 -57 36 55.0           ~ 9 0
12 DES J210257.79-620045.9 G 21 02 57.86425 -62 00 46.0864           ~ 3 0
13 WISEA J210258.15-620014.4 G 21 02 58.15 -62 00 14.4           ~ 4 0
14 ORC J2103-6200 Rad 21 02 58.30 -62 00 16.0           ~ 17 0

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