Nuclear Starbursts in the Dusty Tori of Seyfert 1 and 2 Galaxies

Details Nuclear Starbursts in the Dusty Tori of Seyfert 1 and 2 Galaxies Nuclear Starbursts in the Dusty Tori of Seyfert 1 and 2 Galaxies

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..373..608i&link_type=abstract

The Central Engine of Active Galactic Nuclei, ASP Conference Series, Vol. 373, proceedings of the conference held 16-21 October,

Physics

Scientific paper

We report on the results of infrared L-band (3-4 μm) slit spectroscopy of nearby 23 Seyfert 1 and 32 Seyfert 2 galaxies at z < 0.035. A polycyclic aromatic hydrocarbon (PAH) emission feature at 3.3 μm is primarily used to investigate putative nuclear starbursts in dusty tori around central active galactic nuclei (AGNs). The 3.3 μm PAH emission is detected in 10 Seyfert 1 (43%) and 11 Seyfert 2 (34%) nuclei. The magnitudes of nuclear starbursts are quantitatively estimated from the observed 3.3 μm PAH emission luminosities. We find that there is no significant difference in nuclear starburst to AGN luminosity ratios between Seyfert 1 and 2 galaxies, and that nuclear starburst luminosity positively correlates with AGN power in both types of Seyferts. Our results favor a slightly-modified AGN unification model, which predicts that nuclear starbursts occurring in the dusty tori of Seyferts are physically connected to the central AGNs.

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