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Issue A&A
Volume 386, Number 3, May II 2002
Page(s) L19 - L22
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20020388



A&A 386, L19-L22 (2002)
DOI: 10.1051/0004-6361:20020388

Letter

Geometry and kinematics in the central broad-line region of a Seyfert 1 galaxy

W. Kollatschny1, 2 and K. Bischoff1

1  Universitäts-Sternwarte Göttingen, Geismarlandstraße 11, 37083 Göttingen, Germany
2  Department of Astronomy and McDonald Observatory, University of Texas at Austin, Austin, TX 78712, USA

(Received 9 February 2002 / Accepted 13 March 2002)

Abstract
We recorded spectra of the highly variable Seyfert 1 galaxy Mrk 110 in a variability campaign with the 9.2 m Hobby-Eberly Telescope at McDonald Observatory in order to study the detailed line profile variations of the broad emission lines. Here we show that only an AGN model predicting the formation of the broad H $\beta$ line emission in the wind of an accretion disk matches the observed 2-D variability pattern. Furthermore, we derive an improved mass of the central supermassive black hole of $M = 1.0^{+1.0}_{-0.5}\times 10^{7}~M_{\odot}$ from the H $\beta$ velocity-delay map.


Key words: accretion disks -- line: profiles -- galaxies: Seyfert -- galaxies: individual: Mrk 110 -- galaxies: nuclei -- galaxies: quasars: emission lines

Offprint request: W. Kollatschny, wkollat@uni-sw.gwdg.de

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© ESO 2002


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