Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20911106d&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #111.06; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
We present Spitzer Space Telescope Infrared (IR) spectroscopy and the Hubble Space Telescope WFPC2 archival imaging of dust and gas within the central engines of Seyfert Galaxies. Using spectroscopy, we constrain the physical properties of the warm dust heated by the AGN; using imaging, we identify large-scale cold dust features in central regions of Seyfert galaxies. In particular, we characterize the IR spectral energy distributions of Seyfert galaxies using the Spitzer archives and provide diagnostics that allow separation of the AGN and the starburst components. We aim to answer some of the following basic questions: what is the geometry and structure of the dust obscuration? what is it's temperature, density and distance from the continuum source? We use this information to test the Unified model and the presumed existence a torus-like geometry for the dust obscuration. We combine the results from the IR spectroscopy and the broad-band image analysis of the central regions of Seyfert galaxies to understand the gas and dust inflow to the central engine.
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