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The Radio-Loud Fraction of Quasars is a Strong Function of Redshift and Optical Luminosity
Linhua Jiang, Xiaohui Fan, Zeljko Ivezic +4
Using a sample of optically-selected quasars from the Sloan Digital Sky Survey, we have determined the radio-loud fraction (RLF) of quasars as a function of redshift and optical lu…
Evolution of the X-ray Emission of Radio-Quiet Quasars
Brandon C. Kelly, Jill Bechtold, Aneta Siemiginowska +2
We report new Chandra observations of seven optically faint, z \sim 4 radio-quiet quasars. We have combined these new observations with previous Chandra observations of radio-quiet…
Virial Masses of Black Holes from Single Epoch Spectra of AGN
Brandon C. Kelly, Jill Bechtold
We describe the general problem of estimating black hole masses of AGN by calculating the conditional probability distribution of M_BH given some set of observables. Special attent…