Photometric abundances of type II Cepheid variables.
Abstract
Washington-system colors and V magnitudes of 63 Type II Cepheids are used to investigate the distribution of metal abundances in these stars and correlations of their abundances with position in the Galaxy. Only a small fraction of Cepheids in the field represent a true halo population; most have characteristics of a transition population between the halo and the disk. The origin of the metal-rich stars and their relation to the metal-rich RR Lyraes is discussed. The abundance distribution of all Type II Cepheids shows no strong dependence on distance from the galactic center.
- Publication:
-
The Astronomical Journal
- Pub Date:
- May 1981
- DOI:
- 10.1086/112937
- Bibcode:
- 1981AJ.....86..719H
- Keywords:
-
- Abundance;
- Cepheid Variables;
- Heavy Elements;
- Metallic Stars;
- Stellar Spectrophotometry;
- Astrometry;
- Distance;
- Galactic Structure;
- Halos;
- Red Shift;
- Star Distribution;
- Stellar Evolution;
- Stellar Luminosity;
- Stellar Magnitude;
- Astrophysics