Near-infrared probing of embedded structures in starburst and Seyfert galaxies

Details Near-infrared probing of embedded structures in starburst and Seyfert galaxies Near-infrared probing of embedded structures in starburst and Seyfert galaxies

2000-06-29

arxiv.org/abs/astro-ph/0006420v1

Astronomy and Astrophysics

Astrophysics

19 pages, 10 figures, accepted for publication in A&AS

Scientific paper

10.1051/aas:2000250

Surface photometry in the J and K' bands of 15 southern Seyfert or starburst galaxies is presented. The detailed central morphology and structural properties of these objects were analyzed by fitting ellipses to isophotes. New central peculiar structures have been identified like, for instance, three double-barred systems (ESO 215-G031; ESO 320-G030; ESO 443-G017), one object with a nested nuclear spiral structure at the center of a primary bar (NGC 5135), one object with a nuclear bar without evidence of a large-scale bar (NGC 4941), and one galaxy with a likely dissolved secondary bar within a primary one (ESO 508-G005). The J-K' radial profile proved to be reasonably well linked with the presence of a starburst, but not with the Seyfert activity. For significant starbursts, the central J-K' value is 0.3-1.5 magnitude larger than the disc one.

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