TY - JOUR
T1 - MeerKAT uncovers the physics of an odd radio circle
AU - Norris, Ray P.
AU - Collier, J. D.
AU - Crocker, Roland M.
AU - Heywood, Ian
AU - Macgregor, Peter
AU - Rudnick, L.
AU - Shabala, Stas
AU - Andernach, Heinz
AU - da Cunha, Elisabete
AU - English, Jayanne
AU - Filipović, Miroslav
AU - Koribalski, Barbel S.
AU - Luken, Kieran
AU - Robotham, Aaron
AU - Sekhar, Srikrishna
AU - Thorne, Jessica E.
AU - Vernstrom, Tessa
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
UR - https://hdl.handle.net/1959.7/uws:68849
U2 - 10.1093/mnras/stac701
DO - 10.1093/mnras/stac701
M3 - Article
SN - 0035-8711
VL - 513
SP - 1300
EP - 1316
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -