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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 358576.0, MPI für Astronomie / Publikationen_mpia
Aromatic features in AGNs: star-forming infrared luminosity function of AGN host galaxies
Authors:Shi, Y.; Ogle, P.; Rieke, G. H.; Antonucci, R.; Hines, D. C.; Smith, P. S.; Low, F. J.; Bouwman, J.; Willmer, C.
Date of Publication (YYYY-MM-DD):2007
Title of Journal:The Astrophysical Journal
Start Page:841
End Page:861
Audience:Not Specified
Abstract / Description:We describe observations of aromatic features at 7.7 and 11.3 mum in AGNs of three types, including PG, 2MASS, and 3CR objects. The feature has been demonstrated to originate predominantly from star formation. Based on the aromatic-derived star-forming luminosity, we find that the far-IR emission of AGNs can be dominated by either star formation or nuclear emission; the average contribution from star formation is around 25% at 70 and 160 mum. The star-forming infrared luminosity functions of the three types of AGNs are flatter than those of field galaxies, implying that nuclear activity and star formation tend to be enhanced together. The star-forming luminosity function is also a function of the strength of nuclear activity from normal galaxies to the bright quasars, with luminosity functions becoming flatter for more intense nuclear activity. Different types of AGNs show different distributions in the level of star formation activity, with 2MASS > PG > 3CR star formation rates.
Free Keywords:Galaxies: Active; Galaxies: Starburst; Infrared: Galaxies
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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