Constraints on the nucleosynthesis of CU and Zn from models of chemical evolutino of the Galaxy

Details Constraints on the nucleosynthesis of CU and Zn from models of chemical evolutino of the Galaxy Constraints on the nucleosynthesis of CU and Zn from models of chemical evolutino of the Galaxy

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...272..421m&link_type=abstract

Astronomy and Astrophysics, Vol. 272, p. 421 (1993)

Astronomy and Astrophysics

Astrophysics

63

Stars: Abundances, Nucleosynthesis, Galaxy: The Evolution Of

Scientific paper

The observed abundances of Cu and Zn in stars of different metallicities are compared with chemical evolution models for the Galaxy adopting current stellar nucleosynthesis results. Cu and Zn are both produced by s-processing in massive stars (weak component) and by s-processing in low mass stars (main component) as well as by explosive nucleosynthesis in supernovae. The most important contributions to Cu and Zn are those from supernovae and the weak component, while the contribution from the main component is negligible. The stellar yields for the weak component are now fairly well established, whereas those for the explosive nucleosynthesis are still affected by large uncertainties.
We suggest that a satisfactory agreement between theory and observations cannot be obtained without assuming that a substantial fraction of these isotopes is produced by type Ia supernovae (SNIa). We also show that the best model to fit the majority of observational constraints requires that SNIa already influenced the chemical evolution of halo stars and globular clusters formed in the range of metallicity -2.0 ≤ [Fe/H] ≤ -1.0.

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