Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-02-16
Astrophys.J.525:685,1999
Astronomy and Astrophysics
Astrophysics
accepted by ApJ
Scientific paper
10.1086/307933
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 H$\alpha$+[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.
Alonso-Herrero Almudena
Falcke Heino
McDonald Colleen
Quillen Alice. C.
Rieke George H.
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