Year: 2025
Type: article
Abstract: We present a catalogue of 3 557 Double Radio sources associated with Active Galactic Nuclei (DRAGNs) from the First Pilot Survey of the Evolutionary Map of the Universe (EMU), observed at 944 MHz with the Australian Square Kilometre Array Pathfinder (ASKAP) telescope, covering 270 deg $^{2}$ . We have extracted and identified each source by eye, tagged it with a morphological type and measured its parameters. The resulting catalogue will be used in subsequent papers to explore the properties of these sources, to train machine-learning algorithms for the detection of these sources in larger fields, and to compare with the results of Citizen Science projects, with the ultimate goal of understanding the physical processes that drive DRAGNs. Compared with earlier, lower sensitivity, catalogues, we find more diffuse structure and a plethora of more complex structures, ranging from wings of radio emission on the side of the jets, to types of object which have not been seen in earlier observations. As well as the well-known FR1 and FR2 sources, we find significant numbers of rare types of radio source such as Hybrid Morphology Radio Sources and one-sided jets, as well as a wide range of bent-tail and head-tail sources.
Authors: Ray P. Norris, Miranda Yew, Evan J. Crawford, Nikhel Gupta, Lawrence Rudnick, Heinz Andernach, Miroslav D. Filipović, Yjan Gordon, Andrew Hopkins, Laurence Park, Michael Brown, Ana Maria Jimenez Gallardo, Stanislav Shabala
Institutions: Commonwealth Scientific and Industrial Research Organisation, Western Sydney University, University of Minnesota, Universidad de Guanajuato, Thüringer Landessternwarte Tautenburg, University of Wisconsin–Madison, Macquarie University, Monash University, European Southern Observatory, University of Tasmania, ARC Centre of Excellence for All-sky Astrophysics
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,550
OpenAlex ID: W4414675656