Abstract
An investigation of the physical conditions present in the circumnuclear regions of 20 nearby, non-interacting Seyfert galaxies is reported. Significant differences are observed between the circumnuclear properties of Seyfert 1s and Seyfert 2s with regards to extended ionized gas. The morphology and ionization of the circumnuclear gas suggests collimation of the nuclear ionizing radiation field; in 4 cases taking the form of distinct conical distributions of ionized gas emanating from the nucleus. Some of these properties are consistent with prevailing “unified” models for AGN. However, it is difficult to reconcile all of the observed differences between Seyfert 1s and 2s with this picture.
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