scholarly journals Counting quasar–radio source pairs to derive the millijansky radio luminosity function and clustering strength toz = 3.5

2015 ◽  
Vol 452 (3) ◽  
pp. 2692-2699 ◽  
Author(s):  
S. Fine ◽  
T. Shanks ◽  
R. Johnston ◽  
M. J. Jarvis ◽  
T. Mauch
Keyword(s):  
Radio Source ◽  
Luminosity Function ◽  
Radio Luminosity ◽  
Radio Luminosity Function

scholarly journals Radio Source Evolution Derived from Low Frequency Surveys

2002 ◽  
Vol 199 ◽  
pp. 50-53
Author(s):  
C.A. Jackson ◽  
J.V. Wall
Keyword(s):  
Radio Source ◽  
Luminosity Function ◽  
Low Frequency ◽  
Radio Galaxies ◽  
Parametric Models ◽  
Radio Luminosity ◽  
Space Density ◽  
Radio Data ◽  
Radio Luminosity Function

We find simple parametric models to describe the space density evolution of radio-loud AGN, treating FRI and FRII radio galaxies separately as the two parent populations in our dual-population unified scheme. In this we use low frequency radio data (v < 500 MHz), where radio samples are unbiased by Doppler beaming. Incorporated into this latest analysis is a new determination of the local radio luminosity function at 1.4 GHz from galaxies common to both the 2dFGRS and NVSS surveys.

scholarly journals Determining the Core Radio Luminosity Function of Radio AGNs via Copula

2018 ◽  
Vol 239 (2) ◽  
pp. 33 ◽  
Author(s):  
Zunli Yuan ◽  
Jiancheng Wang ◽  
D. M. Worrall ◽  
Bin-Bin Zhang ◽  
Jirong Mao
Keyword(s):  
Luminosity Function ◽  
Radio Luminosity ◽  
The Core ◽  
Radio Luminosity Function

scholarly journals The optically selected 1.4-GHz quasar luminosity function below 1 mJy

2020 ◽  
Vol 492 (4) ◽  
pp. 5297-5312 ◽  
Author(s):  
Eliab Malefahlo ◽  
Mario G Santos ◽  
Matt J Jarvis ◽  
Sarah V White ◽  
Jonathan T L Zwart
Keyword(s):  
Luminosity Function ◽  
Significant Contribution ◽  
Detection Threshold ◽  
Simulated Data ◽  
Sloan Digital Sky Survey ◽  
Radio Luminosity ◽  
Host Galaxies ◽  
Star Forming ◽  
Sky Survey ◽  
Radio Luminosity Function

ABSTRACT We present the radio luminosity function (RLF) of optically selected quasars below 1 mJy, constructed by applying a Bayesian-fitting stacking technique to objects well below the nominal radio flux density limit. We test the technique using simulated data, confirming that we can reconstruct the RLF over three orders of magnitude below the typical 5σ detection threshold. We apply our method to 1.4-GHz flux densities from the Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) survey, extracted at the positions of optical quasars from the Sloan Digital Sky Survey over seven redshift bins up to z = 2.15, and measure the RLF down to two orders of magnitude below the FIRST detection threshold. In the lowest redshift bin (0.2 &lt; z &lt; 0.45), we find that our measured RLF agrees well with deeper data from the literature. The RLF for the radio-loud quasars flattens below $\log _{10}[L_{1.4}/{\rm W\, Hz}^{-1}] \approx 25.5$ and becomes steeper again below $\log _{10}[L_{1.4}/{\rm W\, Hz}^{-1}] \approx 24.8$, where radio-quiet quasars start to emerge. The radio luminosity where radio-quiet quasars emerge coincides with the luminosity where star-forming galaxies are expected to start dominating the radio source counts. This implies that there could be a significant contribution from star formation in the host galaxies, but additional data are required to investigate this further. The higher redshift bins show a similar behaviour to the lowest z bin, implying that the same physical process may be responsible.

scholarly journals Erratum: Supernova Remnants in the Local Group – I. A model for the radio luminosity function and visibility times of supernova remnants

2019 ◽  
Vol 487 (4) ◽  
pp. 5813-5813 ◽  
Author(s):  
Sumit K Sarbadhicary ◽  
Carles Badenes ◽  
Laura Chomiuk ◽  
Damiano Caprioli ◽  
Daniel Huizenga
Keyword(s):  
Supernova Remnants ◽  
Luminosity Function ◽  
Local Group ◽  
Radio Luminosity ◽  
Group I ◽  
Radio Luminosity Function

Hot gaseous coronae of early-type galaxies and their radio luminosity function

Nature ◽  
1988 ◽  
Vol 333 (6168) ◽  
pp. 49-51 ◽  
Author(s):  
Gopal-Krishna ◽  
Paul J. Wiita
Keyword(s):  
Luminosity Function ◽  
Early Type ◽  
Radio Luminosity ◽  
Radio Luminosity Function
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