THE DISTRIBUTION OF IONIZED-GAS IN EARLY-TYPE GALAXIES .2. THE VELOCITY-FIELD OF THE IONIZED-GAS

Authors
ZEILINGER WW PIZZELLA A AMICO P BERTIN G BERTOLA F BUSON LM DANZIGER LJ DEJONGHE H SADLER EM SAGLIA RP DEZEEUW PT
Citation
Ww. Zeilinger et al., THE DISTRIBUTION OF IONIZED-GAS IN EARLY-TYPE GALAXIES .2. THE VELOCITY-FIELD OF THE IONIZED-GAS, Astronomy & Astrophysics. Supplement series, 120(2), 1996, pp. 257-266
Citations number
29
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy & Astrophysics. Supplement series → ACNP
ISSN journal
03650138
Volume
120
Issue
2
Year of publication
1996
Pages
257 - 266
Database
ISI
SICI code
0365-0138(1996)120:2<257:TDOIIE>2.0.ZU;2-N
Abstract
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 a nd NGC 7097. This is part of an ESO Key Programme intended to derive t he mass distribution of elliptical galaxies and to investigate the pos sible presence of dark matter. All galaxy spectra are characterized by LINER-type emission. The derived gas kinematics confirm the picture o f a regular gaseous disk structure with ordered rotation. The gas velo city dispersion profiles decline rapidly from a high central value in the range of similar or equal to 150 to similar or equal to 250 km/s.