SIMBAD references

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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