Magnesium isotopes in moderately metal-poor stars

Details Magnesium isotopes in moderately metal-poor stars Magnesium isotopes in moderately metal-poor stars

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...151..189b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 151, no. 1, Oct. 1985, p. 189-197. Research supported by the Fundacao de Ampar

Astronomy and Astrophysics

Astrophysics

31

Cool Stars, Magnesium Isotopes, Stellar Composition, Atmospheric Models, Stellar Atmospheres, Stellar Spectra

Scientific paper

High resolution Reticon spectra of MgH (A2π-X2Σ+) (0, 0) and (1, 1) lines at λλ5134 - 5137 Å are used to determine the relative abundances of magnesium isotopes in halo stars. Spectrum synthesis calculations are applied to the 24 halo G and K observed stars with metal abundances in the range 1.5 < [Fe/H] < 0.0. Values close to solar ratios 24Mg:25Mg:26Mg = 79:10:11 are generally found. The odd-even effect is only present to a small extent, the predictions from purely explosive conditions are not met and therefore a production of neutrons probably during hydrostatic shell carbon burning must be important.

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