Using Radio Non-Detections to Determine the Relationship between Radio Loudness of AGN and their Fundamental Parameters

Details Using Radio Non-Detections to Determine the Relationship between Radio Loudness of AGN and their Fundamental Parameters Using Radio Non-Detections to Determine the Relationship between Radio Loudness of AGN and their Fundamental Parameters

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924331k&link_type=abstract

American Astronomical Society, AAS Meeting #219, #243.31

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Scientific paper

While it is debated as to whether a dichotomy between radio-loud and radio-quiet quasars actually exists, the fact remains that some quasars are radio-loud while others are not. Using stacking analysis of radio-quiet optically-confirmed SDSS quasars (undetected by FIRST), we search for
trends in radio properties as a function of redshift and luminosity in
attempt to isolate the "parent sample" of radio-loud quasars. We further explore trends in radio properties as a function of two parameters of the CIV emission line (the equivalent width and the "blueshift"), which are correlated with the ionizing spectrum. The CIV emission line parameter space affords a unique way to probe the radio properties of undetected quasars: we predict that radio-quiet quasars at opposites extremes in their ionizing spectra will have very different median stacked radio properties. We further break our sample into smaller subsets (e.g., based on optical luminosity) to explore the radio-dependence on these parameters. Stacking subsets of quasars undetected by FIRST offers a fresh new insight to a frustratingly stagnant problem.

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