Forum Springer Astron. Astrophys.
Forum Whats New Search Orders

Astron. Astrophys. 334, 805-813 (1998)

Table of Contents
Available formats: HTML | PDF | (gzipped) PostScript

A simple kinematic modeling for flattened S0 galaxies *

E. Loyer 1, F. Simien 2, R. Michard 3 and Ph. Prugniel 2

1 École Normale Supérieure de Lyon, 46 allée d'Italie, F-69364 Lyon Cedex 07, France
2 CRAL-Observatoire de Lyon (CNRS: UMR 142), F-69561 St-Genis-Laval Cedex, France
3 Observatoire de la Côte d'Azur, B.P. 139, F-06003 Nice Cedex 4, France

Received 26 January 1998 / Accepted 11 March 1998


We present mass models for three S0 galaxies with a strong disk component observed almost on edge (NGC 2732, NGC 4111, and NGC 4350). For the analytical representation of the surface-brightness distribution, the method of Multi-Gaussian Expansion, first presented by Monnet et al. (1992: A&A 253, 366) is applied to V -band surface photometry. A simplified dynamical model is adopted, and the calculated kinematic profiles are compared to long-slit spectroscopic data; overall agreement is reached, except for the innermost region, where additional mass is needed for all three galaxies. We discuss possible applications.

Key words: galaxies: elliptical and lenticular, cD – galaxies: kinematics and dynamics – galaxies: fundamental parameters – galaxies: individual: NGC 2732 – galaxies: individual: NGC 4111 – galaxies: individual: NGC 4350

* Based in part on observations collected at the Observatoire de Haute-Provence.

Send offprint requests to: F. Simien,

© European Southern Observatory (ESO) 1998

Online publication: June 2, 1998