profile substructure in radio–quiet quasars
Astronomisches Institut Ruhr–Universität Bochum, Universitätsstrasse 150, 44780 Bochum, Germany e-mail: [leipski;nbennert]@astro.rub.de
Accepted: 4 November 2005
Interactions between the radio jet and the optical emission of the narrow-line region (NLR) are a well known phenomenon in Seyfert galaxies. Here, we present the study of possible jet-NLR interactions in five radio-quiet PG quasars with double or triple radio structure. High spatial and spectral resolution observations were carried out in the Hβ- λ5007 wavelength range. In all cases, there is evidence for  profile substructure (shoulders, subpeaks, blueshifted “broad” components) with different clarity. To measure the velocity, line width, intensity, and location of these  components, several Gaussians were fitted. Often, the substructures are more pronounced close to the radio lobes, suggestive of jet-NLR interactions. Our observations support the unification scheme in which radio-quiet quasars are assumed to be the luminous cousins of Seyfert galaxies.
Key words: galaxies: active / galaxies: quasars: emission lines / galaxies: jets
© ESO, 2006