The lithium isotope ratio in F and G stars.
Abstract
The lithium doublet at 6707 Å has been observed at high spectral resolution in the spectra of 8 solar-type dwarfs, known to have strong Li lines, and in the Population II star ν Ind. The wavelength shifts of the lines and the line profiles were analyzed in attempts to determine the 6Li/7Li ratios. An upper limit of about 0.10 was found, in conflict with earlier claims that some of these stars are rich in 6Li. However, it is suggested that some of them have a 6Li/7Li ratio significantly different from zero and that the isotopic ratio possibly is correlated with v sin i.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 1984
- Bibcode:
- 1984A&A...136...65A
- Keywords:
-
- Dwarf Stars;
- F Stars;
- G Stars;
- Lithium Isotopes;
- Stellar Composition;
- Abundance;
- Doppler Effect;
- Resonance Lines;
- Spectral Line Width;
- Spectral Resolution;
- Stellar Spectra;
- Subgiant Stars;
- Astrophysics