Near–infrared probing of embedded structures in starburst and Seyfert galaxies^*

¹ Observatoire de Genève, CH-1290 Sauverny, Switzerland
² Gymnase de Nyon, CH-1260 Nyon, Switzerland
³ Observatoire Astronomique de Marseille–Provence, F-13248 Marseille Cedex 4, France
⁴ Canada–France–Hawaii Telescope, PO Box 1597, Kamuela, HI 96743, U.S.A.

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Received: 14 March 2000
Accepted: 27 May 2000

Abstract

Surface photometry in the J and 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 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 value is 0.3 - 1.5 magnitude larger than the disc one.