Galaxy Interaction and Starburst-Seyfert Connection

Abstract

Galaxy interactions are studied in terms of the starburst-Seyfert connection. The starburst requires a high rate of gas supply. Since the efficiency for supplying the gas is high in a galaxy interaction, although the companion is not necessarily discernible, Seyfert galaxies with circumnuclear starbursts are expected to be interacting. Since the large amounts of circumnuclear gas and dust obscure the broad-line region, they are expected to be observed as Seyfert 2. The active galactic nucleus itself does not require a high rate of gas supply. Seyfert galaxies without circumnuclear starbursts are not necessarily expected to be interacting even at the highest luminosities. They are not necessarily expected to evolve from Seyfert galaxies with circumnuclear starbursts. We derive these and other theoretical expectations and confirm them with statistics on observational data of magnitude-limited samples of Seyfert galaxies.

arXiv comment28 pages, to appear in The Astrophysical Journal

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Cited by in corpus (5)

• Optical colours of AGN in the Extended Chandra Deep Field South: Obscured black holes in early type galaxies
• Evidence of AGN activity in the gamma-ray emission from two starburst galaxies
• Searching for hidden AGN in nearby star-forming galaxies with Chandra
• Numerical simulations on the relative importance of starbursts and AGN in ultra-luminous infrared galaxies
• The Diagnostics and Possible Evolution in Active Galactic Nuclei Associated With Starburst Galaxies