Dust lanes causing structure in the extended narrow line region of early-type Seyfert galaxies

Details Dust lanes causing structure in the extended narrow line region of early-type Seyfert galaxies Dust lanes causing structure in the extended narrow line region of early-type Seyfert galaxies

1999-02-16

arxiv.org/abs/astro-ph/9902233v2

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.

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