Zeta 1 and Zeta 2 RETICULI : a puzzling solar-type twin system.
Abstract
The authors report the detailed analysis of the solar type stars ζ1 and ζ2Ret. They have solar heavy element abundances and their gravity is found to be abnormally large: log g = 4.7. This, together with their luminosity, typical of subdwarfs, strongly supports the idea that they are significantly helium-rich, with n(He)/n(H) = 0.22±0.04.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 1987
- Bibcode:
- 1987A&A...177..204D
- Keywords:
-
- Abundance;
- Helium;
- Line Spectra;
- Stellar Luminosity;
- Stellar Temperature;
- H Lines;
- K Lines;
- Metallicity;
- Ultraviolet Radiation;
- Astrophysics