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  Radio continuum sources behind the Large Magellanic Cloud

Filipovic, M. D., Bojicic, I. S., Grieve, K. R., Norris, R. P., Tothill, N. F. H., Shobhana, D., et al. (2021). Radio continuum sources behind the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 507(2), 2885-2904. doi:10.1093/mnras/stab2249.

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Filipovic, M. D., Author
Bojicic, I. S., Author
Grieve, K. R., Author
Norris, R. P., Author
Tothill, N. F. H., Author
Shobhana, D., Author
Rudnick, L., Author
Prandoni, I., Author
Andernach, H., Author
Hurley-Walker, N., Author
Alsaberi, R. Z. E., Author
Anderson, C. S., Author
Collier, J. D., Author
Crawford, E. J., Author
For, B.-Q., Author
Galvin, T. J., Author
Haberl, F.1, Author              
Hopkins, A. M., Author
Ingallinera, A., Author
Kavanagh, P. J., Author
Koribalski, B. S., AuthorKothes, R., AuthorLeahy, D., AuthorLeverenz, H., AuthorMaggi, P., AuthorMaitra, C.1, Author              Marvil, J., AuthorPannuti, T. G., AuthorPark, L. A. F., AuthorPayne, J. L., AuthorPennock, C. M., AuthorRiggi, S., AuthorRowell, G., AuthorSano, H., AuthorSasaki, M., AuthorStaveley-Smith, L., AuthorTrigilio, C., AuthorUmana, G., AuthorUrosevic, D., Authorvan Loon, J. Th., AuthorVardoulaki, E., Author more..
Affiliations:
1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: We present a comprehensive multifrequency catalogue of radio sources behind the Large Magellanic Cloud (LMC) between 0.2 and 20 GHz, gathered from a combination of new and legacy radio continuum surveys. This catalogue covers an area of ∼144 deg2 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 (α; where Sv ∼ ν0α) of α = −0.89 and mean of −0.88 ± 0.48 for 3636 sources detected exclusively at two frequencies (0.843 and 1.384 GHz) 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 5 GHz, from which we estimate their linear size. 1866 sources from our catalogue are CSS candidates with α < −0.8. We found six candidates for High Frequency Peaker (HFP) sources, whose radio fluxes peak above 5 GHz and no sources with unconstrained peaks and α > 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.

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Language(s): eng - English
 Dates: 2021-08-06
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stab2249
 Degree: -

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Title: Monthly Notices of the Royal Astronomical Society
  Abbreviation : Mon. Not. Roy. Astron. Soc.
Source Genre: Journal
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Pages: - Volume / Issue: 507 (2) Sequence Number: - Start / End Page: 2885 - 2904 Identifier: ISSN: 0035-8711
ISSN: 1365-8711