Paper:	3--4μ Spectroscopy of Seyfert 2 Nuclei
Volume:	290, Active Galactic Nuclei: from Central Engine to Host Galaxy
Page:	511
Authors:	Imanishi, M.
Abstract:	We report on 3--4 micron slit spectroscopy of 13 Seyfert 2 nuclei. The 3.3 micron polycyclic aromatic hydrocarbon (PAH) emission is used to estimate the magnitudes of compact nuclear starbursts (< a few 100 pc), making use of two important advantages: (1) the uncertainty in dust extinction correction is smaller than shorter wavelengths (UV and optical), and (2) even weak starbursts are detectable. Based on our 3--4 micron slit spectra, we find that (1) except in one case, the observed nuclear 3--4 micron emission is dominated by AGN and not by starbursts, (2) compact nuclear starbursts are detected in 6 out of 13 Seyfert 2 nuclei, but cannot dominate the energetics of the galactic infrared dust emission in Seyfert 2 galaxies, and (3) more powerful AGNs tend to be related to more powerful compact nuclear starbursts, provided that the 12 micron luminosity measured with IRAS is a good measure of AGN power. This work will appear as Imanishi (2002, ApJ in press, astro-ph/0112299).

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