Add to ORKGWe take a sample of 94 ultraluminous, optical quasars from the search of over 14,486 deg^2 by Onken et al. 2022 in the range 4.4<redshift<5.2 and match them against the Rapid ASKAP Continuum Survey (RACS) observed on the Australian Square Kilometre Array Pathfinder (ASKAP). From this most complete sample of the bright end of the redshift ~5 quasar luminosity function, there are 10 radio continuum detections of which 8 are considered radio-loud quasars. The radio-loud fraction for this sample is 8.5 \pm 2.9 per cent. Jiang et al. 2007 found that there is a decrease in the radio-loud fraction of quasars with increasing redshift and an increase with increasing absolute magnitude at rest frame 2500 Angstroms. We show that the radio-loud fractio...
We calculate simultaneously the radio and optical luminosity evolutions of quasars, and the distribu...
We calculate simultaneously the radio and optical luminosity evolutions of quasars, and the distribu...
We investigate the evolution of both the radio-loud fraction (RLF) and (using stack-ing analysis) th...
We report on two programs to address differential evolution between the radio-loud and radio-quiet q...
We present deep radio observations of the most distant complete quasar sample drawn from the Sloan D...
We present a new approach to tackling the issue of radio loudness in quasars. We constrain a (simple...
We present deep radio observations of the most distant complete quasar sample drawn from the Sloan D...
Using a sample of optically-selected quasars from the Sloan Digital Sky Survey, we have determined t...
We have made radio observations of 87 optically selected quasars at 5 GHz with the VLA in order to m...
We have made radio observations of 87 optically selected quasars at 5 GHz with the VLA in order to m...
I investigate the evolution of both the radio-loud fraction (RLF) and, using a stacking analysis, th...
Surveys to find high-redshift radio galaxies deliberately exclude optically-bright objects, which ma...
A sample of 103 quasars from the Large Bright Quasar Survey (LBQS) has been observed with the VLA at...
We match quasars discovered in a multi-color survey centered on the northern Hubble Deep Field (HDF)...
We calculate simultaneously the radio and optical luminosity evolutions of quasars, and the distribu...
We calculate simultaneously the radio and optical luminosity evolutions of quasars, and the distribu...
We calculate simultaneously the radio and optical luminosity evolutions of quasars, and the distribu...
We investigate the evolution of both the radio-loud fraction (RLF) and (using stack-ing analysis) th...
We report on two programs to address differential evolution between the radio-loud and radio-quiet q...
We present deep radio observations of the most distant complete quasar sample drawn from the Sloan D...
We present a new approach to tackling the issue of radio loudness in quasars. We constrain a (simple...
We present deep radio observations of the most distant complete quasar sample drawn from the Sloan D...
Using a sample of optically-selected quasars from the Sloan Digital Sky Survey, we have determined t...
We have made radio observations of 87 optically selected quasars at 5 GHz with the VLA in order to m...
We have made radio observations of 87 optically selected quasars at 5 GHz with the VLA in order to m...
I investigate the evolution of both the radio-loud fraction (RLF) and, using a stacking analysis, th...
Surveys to find high-redshift radio galaxies deliberately exclude optically-bright objects, which ma...
A sample of 103 quasars from the Large Bright Quasar Survey (LBQS) has been observed with the VLA at...
We match quasars discovered in a multi-color survey centered on the northern Hubble Deep Field (HDF)...
We calculate simultaneously the radio and optical luminosity evolutions of quasars, and the distribu...
We calculate simultaneously the radio and optical luminosity evolutions of quasars, and the distribu...
We calculate simultaneously the radio and optical luminosity evolutions of quasars, and the distribu...
We investigate the evolution of both the radio-loud fraction (RLF) and (using stack-ing analysis) th...