NEWS (UPSILON-S) ON THE GALACTIC EVOLUTION OF LITHIUM

Citation
F. Matteucci et al., NEWS (UPSILON-S) ON THE GALACTIC EVOLUTION OF LITHIUM, Astronomy and astrophysics, 303(2), 1995, pp. 460-467
Citations number
52
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046361
Volume
303
Issue
2
Year of publication
1995
Pages
460 - 467
Database
ISI
SICI code
0004-6361(1995)303:2<460:N(OTGE>2.0.ZU;2-Z
Abstract
Galactic chemical evolution models are presented that take into accoun t several recent developments: (1) models of classical novae nucleosyn thesis question the total amount of Li-7 produced by these systems; (2 ) observations and models for lithium production in asymptotic giant b ranch stars and the mass of the planetary nebula that they eject; (3) Li-7 production from nu-process nucleosynthesis in Type II supernova e xplosions. The best fitting models for the upper envelope of the obser ved N(Li) as a function of [Fe/H] suggest that Type II supernovae and intermediate-low mass stars each produce about 1/2 of the solar lithiu m abundance, although fractions between 1/4 to 3/4 for each source are not conclusively ruled out. The variance of these fractions primarily reflect the uncertainties in the input nucleosynthesis.