Distribution and motions of atomic hydrogen in lenticular galaxies. II. NGC 7013.
Abstract
The H I-rich S0/a galaxy NGC 7013 was mapped in the H I line with a spatial resolution of 25arcsec×50arcsec (α×δ) and a velocity resolution of 33 km s-1. On the large scale, the H I distribution may be described by two rings, the larger at the edge of the optical disc and the smaller possibly associated with the inner stellar ring in the galaxy. The H I surface density in the disc itself is very low. The authors suggest that NGC 7013 is a former late-type spiral in which the H I density in the disc has become too low for significant star formation. The presence of the outer H I ring in the galaxy makes it unlikely that this is due to external sweeping.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 1984
- Bibcode:
- 1984A&A...133..127K
- Keywords:
-
- Disk Galaxies;
- Galactic Structure;
- Hydrogen Atoms;
- Interstellar Gas;
- Density Distribution;
- Elliptical Galaxies;
- Galactic Evolution;
- Gas Density;
- Gas Flow;
- Lenticular Bodies;
- Milky Way Galaxy;
- Astrophysics