Unexpected circular radio objects at high Galactic latitude

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. Filipović; Tim J. Galvin; Andrew M. Hopkins; Natasha Hurley-Walker; 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

doi:10.1017/pasa.2020.52

Unexpected circular radio objects at high Galactic latitude

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. Filipović, Tim J. Galvin, Andrew M. Hopkins, Natasha Hurley-Walker, Susumu Inoue, Kieran Luken, Peter J. Macgregor, Pero ManojlovićJosh Marvil, Andrew N. O'Brien, Laurence Park, Wasim Raja, Devika Shobhana, Tiziana Venturi, Jordan D. Collier, Catherine Hale, Aidan Hotan, Vanessa Moss, Matthew Whiting

^*Corresponding author for this work

Australian Astronomical Optics

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

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.

Original language	English
Article number	e003
Pages (from-to)	1-15
Number of pages	15
Journal	Publications of the Astronomical Society of Australia
Volume	38
DOIs	https://doi.org/10.1017/pasa.2020.52
Publication status	Published - 18 Jan 2021

Keywords

Extragalactic radio sources

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10.1017/pasa.2020.52

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Norris, R. P., Intema, H. T., Kapińska, A. D., Koribalski, B. S., Lenc, E., Rudnick, L., Alsaberi, R. Z. E., Anderson, C., Anderson, G. E., Crawford, E., Crocker, R., English, J., Filipović, M. D., Galvin, T. J., Hopkins, A. M., Hurley-Walker, N., Inoue, S., Luken, K., Macgregor, P. J., ... Whiting, M. (2021). Unexpected circular radio objects at high Galactic latitude. Publications of the Astronomical Society of Australia, 38, 1-15. Article e003. https://doi.org/10.1017/pasa.2020.52

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title = "Unexpected circular radio objects at high Galactic latitude",

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.",

keywords = "Extragalactic radio sources",

author = "Norris, {Ray P.} and Intema, {Huib T.} and Kapi{\'n}ska, {Anna D.} and Koribalski, {B{\"a}rbel S.} and Emil Lenc and L. Rudnick and Alsaberi, {Rami Z. E.} and Craig Anderson and Anderson, {G. E.} and E. Crawford and Roland Crocker and Jayanne English and Filipovi{\'c}, {Miroslav D.} and Galvin, {Tim J.} and Hopkins, {Andrew M.} and Natasha Hurley-Walker and Susumu Inoue and Kieran Luken and Macgregor, {Peter J.} and Pero Manojlovi{\'c} and Josh Marvil and O'Brien, {Andrew N.} and Laurence Park and Wasim Raja and Devika Shobhana and Tiziana Venturi and Collier, {Jordan D.} and Catherine Hale and Aidan Hotan and Vanessa Moss and Matthew Whiting",

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doi = "10.1017/pasa.2020.52",

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Norris, RP, Intema, HT, Kapińska, AD, Koribalski, BS, Lenc, E, Rudnick, L, Alsaberi, RZE, Anderson, C, Anderson, GE, Crawford, E, Crocker, R, English, J, Filipović, MD, Galvin, TJ, Hopkins, AM, Hurley-Walker, N, Inoue, S, Luken, K, Macgregor, PJ, Manojlović, P, Marvil, J, O'Brien, AN, Park, L, Raja, W, Shobhana, D, Venturi, T, Collier, JD, Hale, C, Hotan, A, Moss, V & Whiting, M 2021, 'Unexpected circular radio objects at high Galactic latitude', Publications of the Astronomical Society of Australia, vol. 38, e003, pp. 1-15. https://doi.org/10.1017/pasa.2020.52

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T1 - Unexpected circular radio objects at high Galactic latitude

AU - Norris, Ray P.

AU - Intema, Huib T.

AU - Kapińska, Anna D.

AU - Koribalski, Bärbel S.

AU - Lenc, Emil

AU - Rudnick, L.

AU - Alsaberi, Rami Z. E.

AU - Anderson, Craig

AU - Anderson, G. E.

AU - Crawford, E.

AU - Crocker, Roland

AU - English, Jayanne

AU - Filipović, Miroslav D.

AU - Galvin, Tim J.

AU - Hopkins, Andrew M.

AU - Hurley-Walker, Natasha

AU - Inoue, Susumu

AU - Luken, Kieran

AU - Macgregor, Peter J.

AU - Manojlović, Pero

AU - Marvil, Josh

AU - O'Brien, Andrew N.

AU - Park, Laurence

AU - Raja, Wasim

AU - Shobhana, Devika

AU - Venturi, Tiziana

AU - Collier, Jordan D.

AU - Hale, Catherine

AU - Hotan, Aidan

AU - Moss, Vanessa

AU - Whiting, Matthew

PY - 2021/1/18

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N2 - 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.

AB - 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.

KW - Extragalactic radio sources

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JO - Publications of the Astronomical Society of Australia

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M1 - e003

ER -

Unexpected circular radio objects at high Galactic latitude

Abstract

Keywords

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