Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...161...39p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 161, no. 1, June 1986, p. 39-46.
Astronomy and Astrophysics
Astrophysics
19
Elliptical Galaxies, Galactic Evolution, Galactic Structure, Milky Way Galaxy, Riemann Manifold, Angular Velocity, Ellipsoids, Equilibrium Equations, Galactic Rotation, Pressure Distribution, Vorticity
Scientific paper
Extending the tensor virial equations analysis the authors obtain new equilibrium solutions for inhomogeneous Riemann ellipsoids. It is shown that, taking into account anisotropic velocity dispersion and a confocal ellipsoidal density distribution, it is possible to find stable ellipsoidal figures of equilibrium, for which the existence of a massive galactic halo as a means of stabilizing the structure against bar-like modes of oscillation is not required. At the same time the amount of velocity dispersion necessary in the model is not far from that actually observed in our galaxy. These results, obtained for specific values of the angular velocity, the vorticity and the axial ratios, naturally lead to triaxial galaxy configurations.
Pacheco F.
Pucacco Giuseppe
Ruffini Remo
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