The Profiles of H-Beta and [OIII] 5007 in Radio-Loud Quasars

Abstract

Moderate-resolution spectra of the H$β$--[O III] $λ$5007 region have been obtained for 41 radio-loud quasars in order to investigate relationships among their broad- and narrow-line profiles, radio structures, and X-ray properties. Spectra from the literature have been included to form a data set of 60 radio-loud quasars. A variety of statistical analyses have been performed, identifying several strong, related trends. The FWHM, equivalent width, and degree of redward asymmetry of H$β$ increase with decreasing radio core dominance (an orientation indicator), whereas the FWHM of [O III] $λ$5007 increases with luminosity and $α_{ox}$. These and other effects are briefly discussed.