GALAXIES

Multiband analysis of central-region features

Ph. Héraudeau (1), F. Simien (1), and G.A. Mamon (2)
(1) Observatoire de Lyon, F-69561 Saint-Genis-Laval cedex, France
(2) Institut d'Astrophysique, 98 bis boulevard Arago, F-75014 Paris, France

Abstract

Surface photometry in the J, H, and K' bands for four inclined Sa-Sb galaxies is used to analyze the morphology and/or absorbing properties of several features located in the inner regions.

As part of a wider surface-photometry program on nearby galaxies (Hérau-deau, Simien and Mamon 1996), we have used the IRAC2-A camera attached to the 2.2-m ESO/MPI telescope to get J, H, and K' images on four spirals with a large angular diameter and a high inclination (>70 degrees). These data are completed by B and R images from the ESO-LV database (Lauberts and Valentijn 1989), for a wider frequency coverage. Here we present our preliminary analysis of dust lanes, dust patches, and other features appearing in the innermost regions.

Text of the article (compressed PostScript file)

Last revised: 11-nov-1995, PhP prugniel@obs.univ-lyon1.fr