Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...349..510v&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 349, Feb. 1, 1990, p. 510-514. Research sponsored by P.I.C.S.
Astronomy and Astrophysics
Astrophysics
6
Globular Clusters, Lithium, Metallicity, Stellar Evolution, Nuclear Fusion, Stellar Composition, Stellar Luminosity
Scientific paper
The inhomogeneous big-bang models flourishing presently in the literature predict that the primordial mass fraction of Li-7 could reach 10 to the -7th, whereas the observed value in unevolved halo stars is about 6 x 10 to the -10th, in marked contrast. Using a simple model of chemical evolution of globular clusters, it is shown that these results cannot be reconciled: Li-7 is unsignificantly depleted in the cluster gas during the limited time of star formation, whereas the abundance of Fe, originating from relatively massive and short-lived stars increases by two orders of magnitude. The observed constancy of log (Li/H) versus (Fe/H) is thus reproduced.
Cass'e Michel
Oberto Yvette
Vangioni-Flam Elisabeth
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