A Comparison between the Narrow-Line Regions of Seyfert 1 and Seyfert 2 Galaxies

Details A Comparison between the Narrow-Line Regions of Seyfert 1 and Seyfert 2 Galaxies A Comparison between the Narrow-Line Regions of Seyfert 1 and Seyfert 2 Galaxies

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...463..498s&link_type=abstract

Astrophysical Journal v.463, p.498

Astronomy and Astrophysics

Astronomy

93

Galaxies: Seyfert, Galaxies: Active, Galaxies: Structure

Scientific paper

We present high-resolution narrow-band [O III] images of Seyfert 1 and Seyfert 2 galaxies, obtained in the Hubble Space Telescope Data Archive. The continuum-subtracted [O III] images were used to measure the narrow- line region (NLR) sizes and compare them with the predictions from the Unified Scheme. This paper shows that the Seyfert 1 NLR sizes are much smaller than the NLR sizes of the Seyfert 2's if they were observed pole- on. We propose that the Unified Scheme is not wrong but rather that the Seyfert 1's may have their torus axes aligned close to the galaxy plane axis.

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