Radio continuum sources behind LMC

We present a comprehensive multifrequency catalogue of radio sources behind the Large Magellanic Cloud (LMC) between 0.2 and 20GHz, gathered from a combination of new and legacy radio continuum surveys. This catalogue covers an area of ~144deg^2^ at angular resolutions from 45 arcsec to ~3 arcmin. We find 6434 discrete radio sources in total, of which 3789 are detected at two or more radio frequencies. We estimate the median spectral index ({alpha}; where S_v_~{nu}^{alpha}^) of {alpha}=-0.89 and mean of -0.88+/-0.48 for 3636 sources detected exclusively at two frequencies (0.843 and 1.384GHz) with similar resolution [full width at half-maximum (FWHM) ~40-45 arcsec]. The large frequency range of the surveys makes it an effective tool to investigate Gigahertz Peak Spectrum (GPS), Compact Steep Spectrum (CSS), and Infrared Faint Radio Source (IFRS) populations within our sample. We find 10 GPS candidates with peak frequencies near 5GHz, from which we estimate their linear size. 1866 sources from our catalogue are CSS candidates with {alpha}0.5. We found optical counterparts for 343 of the radio continuum sources, of which 128 have a redshift measurement. Finally, we investigate the population of 123 IFRSs found in this study.

Cone search capability for table J/MNRAS/507/2885/table4 (Source list at 0.843 GHz derived from ASKAP-Beta survey)

Cone search capability for table J/MNRAS/507/2885/table5 (source list at 0.843 GHz derived from MOST)

Cone search capability for table J/MNRAS/507/2885/table3 (Point source catalogue in the directions of the LMC)

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Creator Filipovic M.D.; Bojicic I.S.; Grieve K.R.; Norris R.P.; Tothill N.F.H.,Shobhana D.; Rudnick L.; Prandoni I.; Andernach H.; Hurley-Walker N.,Alsaberi R.Z.E.; Anderson C.S.; Collier J.D.; Crawford E.J.; For B.-Q.,Galvin T.J.; Haberl F.; Hopkins A.M.; Ingallinera A.; Kavanagh P.J.,Koribalski B.S.; Kothes R.; Leahy D.; Leverenz H.; Maggi P.; Maitra C.,Marvil J.; Pannuti T.G.; Park L.A.F.; Payne J.L.; Pennock C.M.; Riggi S.,Rowell G.; Sano H.; Sasaki M.; Staveley-Smith L.; Trigilio C.; Umana G.,Urosevic D.; Van Loon J.T.; Vardoulaki E.
Publisher CDS
Publication Year 2022
OpenAccess true
Contact CDS support team <cds-question(at)>
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; Interstellar medium; Natural Sciences; Physics