Astron. Astrophys. Suppl. Ser. 133, 317-323

Stellar kinematical data for the central region of spiral galaxies. I.

Ph. Héraudeau¹ and F. Simien²

Send offprint request: F. Simien (simien@obs.univ-lyon1.fr)

1 - Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
2 - CRAL-Observatoire de Lyon, CNRS: UMR 142, F-69561 St-Genis-Laval Cedex, France

Received February 26; accepted June 19, 1998

Abstract:

We present the results of absorption spectroscopy on the inner region of 34 Sa-Sc galaxies. We have determined the central velocity dispersion and, for 32 of these objects, stellar rotation curves and velocity-dispersion profiles. Some of these profiles are limited to the bulge, some others do reach a region dominated by the luminosity of the disk. These data are intended to provide basic material for the study of the mass distribution and dynamical status in the central regions of spiral galaxies. Although no elaborate bulge-and-disk photometric decomposition is performed, we estimate the effects of limited resolution and contamination by disk light on the central velocity dispersion of the bulge.

Key words: galaxies: spiral -- galaxies: general -- galaxies: kinematics & dynamics