SIMBAD references

2001ApJ...556..676C - Astrophys. J., 556, 676-693 (2001/August-1)

Multicolor optical imaging of infrared-warm Seyfert galaxies. IV. Surface photometry: color distributions.


Abstract (from CDS):

This paper is the fourth in a series studying the optical properties of a sample of mid-infrared warm Seyfert galaxies and of a control sample of mid-infrared cold galaxies. The present paper is devoted to the analysis of the color distributions characterizing the hosts. The warm Seyfert 1 and 2 galaxies show opposite color gradients and their color profiles are depicting age and dust effects within single-burst, solar-metallicity models. In particular, we find ample evidence for the occurrence of strong star formation in the Seyfert 2 disks: their color and emission line two-dimensional maps suggest dust extinction associated with ongoing star formation in spiral and tidal features; their color profiles show starbursts of 0.5-1 Gyr or younger, superposed on the older underlying galaxy population. Most of these properties are shared with the cold galaxies, while the warm Seyfert 1 galaxies show mostly older stellar populations and, in only a few cases, evidence for circumnuclear star formation.

Abstract Copyright:

Journal keyword(s): Galaxies: Active - Galaxies: Interactions - Galaxies: Photometry - Galaxies: Seyfert

CDS comments: IRAS 10475+1429 misprint for 10475-1429.

Simbad objects: 39

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