ASKAP-EMU ESP LMC Radio Continuum Survey

We present an analysis of a new 120 deg^2^ radio continuum image of the Large Magellanic Cloud (LMC) at 888MHz with a bandwidth of 288MHz and beam size of 13.9"x12.1", from the Australian Square Kilometre Array Pathfinder (ASKAP) processed as part of the Evolutionary Map of the Universe (EMU) survey. The median Root Mean Squared noise is 58uJy/beam. We present a catalogue of 54612 sources, divided over a Gold list (30866 sources) complete down to 0.5mJy uniformly across the field, a Silver list (22080 sources) reaching down to <0.2mJy and a Bronze list (1666 sources) of visually inspected sources in areas of high noise and/or near bright complex emission. We discuss detections of planetary nebulae and their radio luminosity function, young stellar objects showing a correlation between radio luminosity and gas temperature, novae and X-ray binaries in the LMC, and active stars in the Galactic foreground that may become a significant population below this flux level. We present examples of diffuse emission in the LMC (HII regions, supernova remnants, bubbles) and distant galaxies showcasing spectacular interaction between jets and intracluster medium. Among 14333 infrared counterparts of the predominantly background radio source population we find that star-forming galaxies become more prominent below 3mJy compared to active galactic nuclei.We combine the new 888MHz data with archival Australia Telescope Compact Array data at 1.4GHz to determine spectral indices; the vast majority display synchrotron emission but flatter spectra occur too. We argue that the most extreme spectral index values are due to variability.

Cone search capability for table J/MNRAS/506/3540/catalog (ASKAP-EMU 888MHz catalogue of the LMC, created using Aegean)

Cone search capability for table J/MNRAS/506/3540/table3 (ASKAP 888MHz radio detections within 10 arcsec of sources at one time classed as potential PNe)

Cone search capability for table J/MNRAS/506/3540/list (Information of fits image)

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Creator Pennock C.M.; van Loon J.T.; Filipovic M.D.; Andernach H.; Haberl F.,Kothes R.; Lenc E.; Rudnick L.; White S.V.; Agliozzo C.; Anton S.,Bojicic I.; Bomans D.J.; Collier J.D.; Crawford E.J.; Hopkins A.M.,Jeganathan K.; Kavanagh P.J.; Koribalski B.S.; Leahy D.; Maggi P.,Maitra C.; Marvil J.; Michalowski M.J.; Norris R.P.; Oliveira J.M.,Payne J.L.; Sano H.; Sasaki M.; Staveley-Smith L.; Vardoulaki E.
Publisher CDS
Publication Year 2021
OpenAccess true
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Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; High Energy Astrophysics; Interstellar medium; Natural Sciences; Observational Astronomy; Physics