The helium abundance of halo dwarfs
Abstract
The helium abundance of halo dwarfs is studied by considering the halo main sequence locus in the luminosity-temperature plane, where helium's effects are detectable. Isochrones computed for a variety of metallicities and helium abundances are compared with each other and with empirical data from nine halo dwarfs. After eliminating results for three discordant stars, a primordial helium abundance of 0.18 + or -0.03 is obtained.
- Publication:
-
Primordial Helium
- Pub Date:
- February 1983
- Bibcode:
- 1983prhe.work..179C
- Keywords:
-
- Abundance;
- Dwarf Stars;
- Helium;
- Stellar Evolution;
- Chemical Composition;
- Halos;
- Stellar Luminosity;
- Stellar Models;
- Astrophysics