SIMBAD references

2018MNRAS.476.2717H - Mon. Not. R. Astron. Soc., 476, 2717-2730 (2018/May-2)

A novel approach for characterizing broad-band radio spectral energy distributions.


Abstract (from CDS):

We present a new broad-band radio frequency catalogue across 0.12 GHz <= ν <= 20 GHz created by combining data from the Murchison Widefield Array Commissioning Survey, the Australia Telescope 20 GHz survey, and the literature. Our catalogue consists of 1285 sources limited by S_20 GHz_ > 40 mJy at 5σ, and contains flux density measurements (or estimates) and uncertainties at 0.074, 0.080, 0.119, 0.150, 0.180, 0.408, 0.843, 1.4, 4.8, 8.6, and 20 GHz. We fit a second-order polynomial in log-log space to the spectral energy distributions of all these sources in order to characterize their broad-band emission. For the 994 sources that are well described by a linear or quadratic model we present a new diagnostic plot arranging sources by the linear and curvature terms. We demonstrate the advantages of such a plot over the traditional radio colour-colour diagram. We also present astrophysical descriptions of the sources found in each segment of this new parameter space and discuss the utility of these plots in the upcoming era of large area, deep, broad-band radio surveys.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: analytical - techniques: photometric - catalogues - radio continuum: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/476/2717): catalog.dat>

Simbad objects: 1285

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