MeerKAT uncovers the physics of an Odd Radio Circle
  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 uJy/bm).
  In addition to the new images, which reveal a complex internal structure
consisting of multiple arcs, we also present polarisation and spectral index
maps. Based on these new data, we consider potential mechanisms that may
generate the ORCs.
