Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..408...47m&link_type=abstract
The Starburst-AGN Connection. ASP Conference Series, Vol. 408, proceedings of the conference held 27-31 October 2008, at Shangha
Astronomy and Astrophysics
Astronomy
Scientific paper
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.
Axon Dave
Cleary Kieran
Geballe Theodore
Gorjian Varoujan
Levenson Nancy A.
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