Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.303..455m&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 303, Issue 3, pp. 455-465.
Astronomy and Astrophysics
Astronomy
12
Galaxies: Elliptical And Lenticular, Cd, Galaxies: Individual: Centaurus A, Galaxies: Kinematics And Dynamics, Galaxies: Structure
Scientific paper
A new development for components of collisionless stellar systems in a triaxial Stackel potential is presented. The non-rotating Abel components introduced by Dejonghe & Laurent are generalized. Two families of components with internal net rotation about the long or short axis of the ellipsoidal figure are described. The simple Abel character of the non-rotating components is no longer conserved when rotation is included. The rotating components can be used to build realistic three-integral dynamical models of elliptical galaxies with rotation. A triaxial dynamical model is proposed for the E2 galaxy Centaurus A. A good fit to the photometry and to planetary nebulae kinematical data (rotation and velocity dispersion on the photometric major and minor axes) is obtained. The total mass for our model of Cen A amounts to ~ 41 x 10^10 M_solar, half of which is dark mass.
Dejonghe Herwig
Mathieu Amélie
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