Issue |
Astron. Astrophys. Suppl. Ser.
Volume 120, Number 2, December I 1996
|
|
---|---|---|
Page(s) | 257 - 266 | |
DOI | https://doi.org/10.1051/aas:1996290 | |
Published online | 15 December 1996 |
The distribution of ionized gas in early-type galaxies. II. The velocity field of the ionized gas*
1
Institut für Astronomie, Universität Wien, Austria
2
Dipartimento di Astronomia, Università di Padova, Italy
3
European Southern Observatory, Garching bei München, Germany
4
Scuola Normale Superiore, Pisa, Italy
5
Osservatorio Astronomico, Padova, Italy
6
Osservatorio Astronomico, Trieste, Italy
7
Sterrenkundig Observatorium, Universiteit Gent, Belgium
8
Astrophysics Department, School of Physics, Univ. of Sydney, Australia
9
Universitäts–Sternwarte München, Germany
10
Sterrewacht Leiden, The Netherlands
Send offprint request to: W.W. Zeilinger, Institut für Astronomie, Türkenschanzstraße 17, A-1180 Wien, Austria
Received:
20
December
1995
Accepted:
1
March
1996
We report observations of the velocity field of the ionized gas in the nearby ellipticals NGC 1453, NGC 2974, NGC 3962, NGC 4636, NGC 6868 and NGC 7097. This is part of an ESO Key Programme intended to derive the mass distribution of elliptical galaxies and to investigate the possible presence of dark matter. All galaxy spectra are characterized by LINER–type emission. The derived gas kinematics confirm the picture of a regular gaseous disk structure with ordered rotation. The gas velocity dispersion profiles decline rapidly from a high central value in the range of to km/s.
Key words: galaxies: elliptical and lenticular, cD / galaxies: ISM / galaxies: structure
© European Southern Observatory (ESO), 1996