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arXiv:2006.14805astro-ph.GA

Unexpected Circular Radio Objects at High Galactic Latitude

Ray P. Norris, Huib T. Intema, Anna D. Kapinska, Baerbel S. Koribalski, Emil Lenc, L. Rudnick, Rami Alsaberi, Craig Anderson, G. E. Anderson, E. Crawford, Roland Crocker, Jayanne English, Miroslav D. Filipovic, Andrew M. Hopkins, Natasha Hurley-Walker, Susumu Inoue, Kieran Luken, Peter Macgregor, Pero Manojlovic, Josh Marvil, Andrew N. O'Brien, Wasim Raja, Devika Shobhana, Tiziana Venturi, Jordan D. Collier, Catherine Hale, Aidan Hotan, Vanessa Moss, Matthew Whiting

Abstract

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

arXiv comments
Accepted for publication by PASA
Journal reference
Publ. Astron. Soc. Aust. 38 (2021) e003
DOI
doi:10.1017/pasa.2020.52
Subjects
astro-ph.GAAstrophysics of Galaxies

On Hacker News

Linked by 3 identifiable commenters in 3 comments across 3 threads, from Jul 2020 to Mar 2022. Found in 1 HN submission from Jul 2020 to Jul 2020. Open submission discussions.

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Discussed in comments3 threads

  1. Bizarre space circle captured in unprecedented detail 1 comment

    • They go into a bit more detail about possible explanations here (this is cited in the paper that the article talks about). https://arxiv.org/abs/2006.14805 They talk about your option in 5.11, "Einstein rings." For reasons that I don't understand (but I don't understand anything…

      bee_riderView on HNParent context

  2. “Odd Radio Circles” have astronomers excited 1 comment

    • paper: https://arxiv.org/pdf/2006.14805.pdf > Frequency range: 800 – 1088 MHz > Total integration time: 100 hours but then > We observed ORC 1 and ORCs 2–3 (Project code C3350)with the Australia Telescope Compact Array (ATCA)on 9–10 April 2020, at 1.1–3.1 GHz (weighted…

      h2odragonView on HNParent context

  3. Highly circular objects spotted in deep space 1 comment

    • Maybe better to just read the arxiv article, linked in OP. It's quite readable for a lay-person such as myself, and the meat is quite short. There are pictures starting page 23. https://arxiv.org/abs/2006.14805

      andrewflnrView on HNParent context

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