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News (νs) on the Galactic evolution of lithium.

MATTEUCCI, MARIA FRANCESCA
•
D'Antona, F.
•
Timmes, F. X.
1995
  • journal article

Periodico
ASTRONOMY & ASTROPHYSICS
Abstract
Galactic chemical evolution models are presented that take into account several recent developments: (1) models of classical novae nucleosynthesis question the total amount of ^7^Li produced by these systems; (2) observations and models for lithium production in asymptotic giant branch stars and the mass of the planetary nebula that they eject; (3) ^7^Li production from ν-process nucleosynthesis in Type II supernova explosions. The best fitting models for the upper envelope of the observed 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 lithium 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.
Archivio
http://hdl.handle.net/11368/2560307
Diritti
metadata only access
Soggetti
  • GALAXY: ABUNDANCES

  • EVOLUTION

  • NUCLEOSYNTHESIS

  • COSMOLOGY: MISCELLANE...

Visualizzazioni
2
Data di acquisizione
Apr 19, 2024
Vedi dettagli
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