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2013MNRAS.428..935H - Mon. Not. R. Astron. Soc., 428, 935-951 (2013/January-2)
Sub-millimetre source identifications and the microjansky source population at 8.4GHz in the William Herschel Deep Field.
HEYWOOD I., BIELBY R.M., HILL M.D., METCALFE N., RAWLINGS S., SHANKS T. and SMIRNOV O.M.
Abstract (from CDS):
More generally, differential radio source counts calculated from the beam-corrected data are in good agreement with previous observations, showing at S < 50µJy a significant excess over a pure AGN model. In the full area, of 10 sources fainter than this limit, six have optical counterparts of which three are UVX (i.e. likely quasars) including the two absorbed quasar LABOCA sources. The other faint radio counterparts are not UVX but are only slightly less blue and likely to be star-forming/merging galaxies, predominantly at lower luminosities and redshifts. The four faint, optically unidentified radio sources may be either dust-obscured quasars or galaxies. These high-redshift obscured AGN and lower redshift star-forming populations are thus the main candidates to explain the observed excess in the faint source counts and hence also the excess radio background found previously by the Absolute Radiometer for Cosmology, Astrophysics and Diffuse Emission (ARCADE2) experiment.
Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)
Journal keyword(s): techniques: interferometric - galaxies: high-redshift - quasars: general - radio continuum: galaxies
Nomenclature: Table 1: [HBH2013] WHDF-EVLA-NN (Nos 1-41). Table 2: [HBH2013] JHHMMSS.ss+DDMMSS.s N=22.
Simbad objects: 63