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Issue A&A
Volume 448, Number 1, March II 2006
Page(s) 165 - 169
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20054459



A&A 448, 165-169 (2006)
DOI: 10.1051/0004-6361:20054459

[ $\ion{O}{iii}$] profile substructure in radio-quiet quasars

C. Leipski and N. Bennert

Astronomisches Institut Ruhr-Universität Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
    e-mail: [leipski;nbennert]@astro.rub.de

(Received 27 July 2005 / Accepted 4 November 2005)

Abstract
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 H$\beta$-[ $\ion{O}{iii}$] $\lambda$5007 wavelength range. In all cases, there is evidence for [ $\ion{O}{iii}$] profile substructure (shoulders, subpeaks, blueshifted "broad" components) with different clarity. To measure the velocity, line width, intensity, and location of these [ $\ion{O}{iii}$] 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

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