Abundance of manganese in metal-poor stars.
Abstract
The abundance of Mn is derived in 25 metal-poor stars (Fe/H between -2.4 and -0.1) of various evolutionary status, using transitions of weak and intermediate strength. Mn is deficient with respect to Fe in metal-poor stars. Observations suggest a constant Mn/Fe ratio for Fe/H less than -1, with a mean value of Mn/Fe = -0.34 + or - 0.06; the Mn/Fe ratio then increases for Fe/H greater than -1, up to the solar values. The run of Mn/Fe with metallicity is symmetric to the run of the ratios between the abundances of light even elements and Fe.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 1989
- Bibcode:
- 1989A&A...208..171G
- Keywords:
-
- Abundance;
- Manganese;
- Metallicity;
- Stellar Composition;
- Hydrogen;
- Hyperfine Structure;
- Iron;
- Spectrum Analysis;
- Stellar Gravitation;
- Astrophysics