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What sparks the radio-loud phase of nearby quasars?

Abstract To better constrain the hypotheses proposed to explain why only a few quasars are radio loud (RL), we compare the characteristics of 1958 nearby (z ≤ 0.3) SDSS (Sloan Digital Sky Survey) quasars, covered by the FIRST (Faint Images of the Radio Sky at Twenty-centimeters) and NVSS (NRAO VLA S...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2017-04, Vol.466 (1), p.921-944
Main Authors: Coziol, Roger, Andernach, Heinz, Torres-Papaqui, Juan Pablo, Ortega-Minakata, René Alberto, Moreno del Rio, Froylan
Format: Article
Language:English
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Summary:Abstract To better constrain the hypotheses proposed to explain why only a few quasars are radio loud (RL), we compare the characteristics of 1958 nearby (z ≤ 0.3) SDSS (Sloan Digital Sky Survey) quasars, covered by the FIRST (Faint Images of the Radio Sky at Twenty-centimeters) and NVSS (NRAO VLA Sky Survey) radio surveys. Only 22 per cent are RL with log (L 1.4 GHz) ≥ 22.5 W Hz−1, the majority being compact (C), weak radio sources (WRS), with log (L 1.4 GHz) 
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stw3164