Unexpected circular radio objects at high Galactic latitude

• DOI: 10.1017/pasa.2020.52
• Publication Date: 2021-01-18T10:37:23Z
• Authors: Ray P. Norris; Huib T. Intema; Anna D. Kapińska; Bärbel S. Koribalski; Emil Lenc; L. Rudnick; Rami Z. E. Alsaberi; Craig Anderson; G. E. Anderson; E. Crawford; Roland Crocker; Jayanne English; Miroslav D. Filip...; Tim J. Galvin; Andrew M. Hopkins; Natasha Hurley-Wa...; Susumu Inoue; Kieran Luken; Peter J. Macgregor; Pero Manojlović; Josh Marvil; Andrew N. O’Brien; Laurence Park; Wasim Raja; Devika Shobhana; Tiziana Venturi; Jordan D. Collier; Catherine Hale; Aidan Hotan; Vanessa Moss; Matthew Whiting
• Keywords: Pathfinder; Square (algebra)

Abstract We have found a class of circular radio objects in the Evolutionary Map Universe Pilot Survey, using Australian Square Kilometre Array Pathfinder telescope. The appear images as edge-brightened discs, about one arcmin diameter, that are unlike other previously reported literature. explore several possible mechanisms might cause these objects, but none seems to be compelling explanation.