Publications of the MPIfR
Optical & Infrared
Interferometry Group
Lira, P.; Kishimoto, M.; Robinson, A.;
Young, S.; Axon, D.; Elvis, M.; Lawrence, A.; Peterson, B.
Resolving the BLR in NGC 3783
Astronomical Society of the Pacific Conference
Series (ASPCS)
The Central Engine of Active Galactic Nuclei conference
held in Xi'An, China from Oct.16-21, 2006
ASP Conference Series, Vol. 373, p.407 (2007)
Abstract
We present results from very high signal-to-noise spectropolarimetric
observations of the Seyfert 1 galaxy NGC 3783. Position Angle (PA)
changes across the Balmer lines show that the scatterer is resolving
the Broad-Emission Line Region (BLR). A broad component seen in
polarized light and located bluewards from the H$\beta$ line very
likely corresponds to HeII$\lambda4686$. The lack of PA changes across
this line suggests that the region responsible for this emission
appears to the scatterer as unresolved as the continuum source, in
agreement with the stratified BLR structure determined from
reverberation mapping.
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