Dynamical properties and two-dimensional classification of disk galaxies.
Abstract
Rotation curves of 22 galaxies are analyzed in order to determine which dynamical characteristics are correlated with either of two parameters which are proposed for classifying galaxies, namely, the mass ratio of the bulge to the disk, and the mass of the galaxy. Masses, angular momenta, and rotational energies of the galaxies are evaluated, and their relations with the morphological sequence are examined. A self-gravitating mass model, obtained by truncating outer spheroidal shells of Brandt and Belton's (1962) model, is used to evaluate the dynamical parameters of disk galaxies.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- 1976
- Bibcode:
- 1976PASJ...28..397W
- Keywords:
-
- Astronomical Models;
- Classifications;
- Dynamic Characteristics;
- Galactic Rotation;
- Galactic Structure;
- Mass Distribution;
- Angular Momentum;
- Astronomical Spectroscopy;
- Centrifugal Force;
- Disks (Shapes);
- Mass Ratios;
- Morphological Indexes;
- Astrophysics