Back to Volume
Paper: Silicate Emission, Hydrocarbon Absorption, and CO Nondetections in Type 2 AGN
Volume: 408, The Starburst−AGN Connection
Page: 47
Authors: Mason, R.E.; Geballe, T.; Levenson, N.A.; Shi, Y.; Packham, C.; Gorjian, V.; Rodriguez-Ardila, A.; Cleary, K.; Axon, D.; Rhee, J.; Werner,M.
Abstract: We use high spatial resolution IR data to investigate the origin of the silicate emission in a Seyfert 2 AGN and to probe the chemistry of the torus in NGC 1068. In NGC 2110, the closest known type 2 AGN with silicate emission features, mid-IR imaging and spectroscopy enable us to set tight constraints on the location of the emitting material (within 32 pc of the nucleus). Clumpy torus model fits to the data show that the silicate emission may arise in an edge-on torus. New L and M band spectra of NGC 1068 reveal the distribution of hydrocarbon absorption across the nucleus and set tighter limits on CO absorption features towards this AGN. Clumpy models of the dust screen might explain the lack of CO and the depth of the silicate feature, but the strength of the 3.4 μm feature, the presence of the silicate feature, and the absence of CO are strongly reminiscent of Galactic diffuse cloud environments.
Back to Volume