Quillen et al., Dust Lanes in Seyfertsy
Dust lanes causing structure in the extended narrow line region of
early-type Seyfert galaxies
Quillen A.C.1, Alonso-Herrero A.1, Rieke M.J.1, McDonald C.1, Falcke H1,2.
1Steward Observatory, The University of Arizona, Tucson, Az, 85721
2Max-Planck-Institut für Radioastronomie, Auf den Hüugel 69, D-53121 Bonn, Germany
We construct near-infrared to visible broad band NICMOS/WFPC color
maps for 4 early-type Seyfert galaxies with S-shaped or one-sided
ionization cones. We find that dust lanes are near or connected to
many of the features seen in the [OIII] and Halpha+[NII] line
emission maps. This suggests that much of the structure of line
emission in these ionization cones is determined by the distribution
of ambient dense galactic gas. Spiral arms, dust lanes caused by bars,
or gaseous warps provide dense gas which when illuminated by a conical
beam of ultraviolet photons can result in the complicated line
emission morphologies observed.
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