Nucleosynthesis of the light metals in the Galaxy - A study of sodium enrichment

Details Nucleosynthesis of the light metals in the Galaxy - A study of sodium enrichment Nucleosynthesis of the light metals in the Galaxy - A study of sodium enrichment

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...165..183f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 165, no. 1-2, Sept. 1986, p. 183-188. CNRS-supported research.

Astronomy and Astrophysics

Astrophysics

35

Dwarf Stars, Metallicity, Nuclear Fusion, Sodium, Stellar Composition, Abundance, Aluminum, Astronomical Spectroscopy, Magnesium, Spectrum Analysis

Scientific paper

High resolution low noise observations of faint sodium lines in the spectra of 16 dwarf stars have been analyzed by spectrum synthesis. The ratio (Na/Mg) seems to be constant in the halo. The constant value (if so) is smaller than the solar one (Na/Mg) = -0.6 + or - 0.2, showing an enhancement of the odd-even effect in the halo relative to the disk. In the disk, the value of the ratio (Na/Mg) is shifting from the halo towards the solar value. The behavior of the light metals in halo dwarfs seems to agree with the recent models of the chemical enrichment of the Galaxy.

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