SIMBAD references

2002ApJ...565..786M - Astrophys. J., 565, 786-799 (2002/February-1)

Far-infrared census of Starburst-Seyfert connection.


Abstract (from CDS):

Far-infrared flux densities are newly extracted from the IRAS database for the Revised Shapley-Ames and CfA complete samples of Seyfert galaxies. These data are used to classify the Seyfert galaxies into those where the far-infrared continuum emission is dominated by the active galactic nucleus (AGN), circumnuclear starburst, or host galaxy.

While AGN-dominant objects consist of comparable numbers of Seyfert 1 and 2 galaxies, starburst- and host-dominant objects consist preferentially of Seyfert 2 galaxies. Thus, in addition to the dusty torus, the circumnuclear starburst region and host galaxy are important in hiding the broad-line region.

Morphologically, starburst-dominant Seyfert galaxies are of later types and more strongly interacting than AGN-dominant Seyfert galaxies. In a later type galaxy, the AGN central engine has a lower Eddington luminosity, and the gaseous content is higher. The gas is efficiently supplied to the starburst via a galaxy-galaxy interaction. Morphologies of host-dominant Seyfert galaxies are of various types.

Since starbursts in Seyfert galaxies are older than those in classical starburst galaxies, we propose an evolution from starburst to starburst-dominant Seyfert to host-dominant Seyfert for a late-type galaxy. An evolution from AGN-dominant Seyfert to host-dominant Seyfert is proposed for an early-type galaxy. These sequences have durations of a few times 108 yr and occur repeatedly within a galaxy during its evolution from a late type to an early type.

Abstract Copyright:

Journal keyword(s): Galaxies: Seyfert - Galaxies: Starburst - Infrared: Galaxies

Simbad objects: 151

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