Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-01-16
Astronomy and Astrophysics
Astrophysics
2 pages, latex, 1 figure. To appear in the Proceedings of the Conference "Cosmic Evolution", Paris, November 2000
Scientific paper
We adopt up-to-date 7Li yields from asymptotic giant branch stars in order to study the temporal evolution of this element in the solar neighbourhood. Several lithium stellar sources are considered besides the AGBs: Type II supernovae, novae, low-mass giants. Galactic cosmic ray nucleosynthesis is taken into account as well. We conclude that AGB stars do not substantially contribute to 7Li enrichment on a Galactic scale. Therefore, a significant 7Li production from novae and low-mass stars is needed to explain the late, steep rise of the 7Li abundance in disk stars and the meteoritic 7Li abundance.
D'Antona Francesca
Matteucci Francesca
Romano Donatella
Ventura Paolo
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