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28th of June 2022
A radio continuum study of NGC 2082
by Balzan et al.
Balzan et al. present radio continuum observations of the nearby spiral galaxy NGC 2082 using the ASKAP, ATCA and Parkes telescopes. The 888 MHz ASKAP data revealed a bright and compact radio source, J054149.24– 641813.7, of unknown origin, some 20 arcsec from the centre of the galaxy. Follow-up Parkes and ATCA data were used to constrain the nature of the source, with potential origins as a supernova remnant or persistent radio source associated with Fast Radio Bursts determined to be unlikely. The authors conclude that the most likely origin for J054149.24–641813.7 is a background quasar or radio galaxy. The image above is a 3-colour HST image of NGC 2082 overlaid with ASKAP and ATCA contours. The blue contours are ASKAP 888 MHz (0.3, 0.5, 0.7, 0.9, 1.3, 1.4, 2.1 mJy/beam), and the light-blue, orange and red contours are ATCA 2100 MHz (0.4, 1.0, 1.5 mJy/beam), 5500 MHz (0.5, 1.0, 1.5 mJy/beam), and 9000 MHz (0.4346, 1.5198, 3.0, 3.4 mJy/beam) respectively. The inset image in the bottom-left provides a zoom-in of J054149.24–641813.7, showing the absence of any optical counterpart. The subplot in the top-right provides a zoom-in of a 888 MHz flux density peak. The magenta triangle denotes the position of SN1992ba.

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