More isotopic oblate rotators in elliptical galaxies.
Abstract
We have extracted from the literature a list of 24 elliptical galaxies showing evidence for having (inner) disks. Reconsidering the (V/σ, ɛ) test, we conclude that kinematical and photometric data (available for 13 galaxies) are consistent with such disk-galaxies being isotropic nearly oblate rotators. We argue that at least about 30 to 50% of genuine E's must have a disk, generally faint, at the low end of the sequence of the disk-to- total luminosity ratio, and are isotropic oblate rotators. Only a favorable orientation reveals the disk in a few of them.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 1988
- Bibcode:
- 1988A&A...195L...1N
- Keywords:
-
- Disk Galaxies;
- Elliptical Galaxies;
- Galactic Structure;
- Isotropic Media;
- Oblate Spheroids;
- Cosmic Dust;
- Galactic Rotation;
- Hubble Diagram;
- Stellar Luminosity;
- Astronomy