Magnesium isotopes in super-metal-rich stars

Details Magnesium isotopes in super-metal-rich stars Magnesium isotopes in super-metal-rich stars

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...172..251b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 172, no. 1-2, Jan. 1987, p. 251-256. Research supported by the Fundacao de Amp

Astronomy and Astrophysics

Astrophysics

13

Magnesium Isotopes, Metallic Stars, Metallicity, Nuclear Fusion, Stellar Composition, Galactic Cosmic Rays, Stellar Spectra

Scientific paper

Very high resolution, high dispersion observations of super-metal-rich stars were made using the 1.4-m coude auxiliary telescope (CAT) at the European Southern Observatory (ESO) at La Silla. Lines belonging to the A-squared Pi X-squared Sigma(+) system of MgH at 5153 A were observed. High signal/noise ratio spectra were obtained in order to determine the ratios of the abundances of Mg-25 and Mg-26 relative to the abundance of Mg-24. The ratios of the three Mg isotopes obtained for the super-metal-rich stars are compared to those for galactic cosmic rays. The results are discussed in terms of the chemical evolution of the Galaxy.

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