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ID: 10732.0, MPI für Astrophysik / Stellar Astrophysics
Galactic evolution of Li-7: observational clues for models
Authors:Travaglio, C.; Randich, S.; Galli, D.; Abia, C.; Lattanzio, J.
Language:English
Date of Publication (YYYY-MM-DD):2002
Title of Journal:Astrophysics and Space Science
Journal Abbrev.:Astrophys. Space Sci.
Volume:281
Issue / Number:1-2
Start Page:219
End Page:220
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Different stellar sources may have contributed to the Li-7 enrichment of the Galaxy: type-II supernovae, novae, and AGB stars. In the latter case, the interplay between the Hot Bottom Burning (HBB) process (via the Cameron-Fowler mechanism) and a very high mass-loss rate before the evolution off the AGB (the so-called `superwind' phase), can lead to a significant production of Li-7 from low- and intermediate-mass AGB stars (Travaglio et al., 2001). We have now undertaken an observational campaign aimed at constraining our stellar and Galactic models, with a twofold goal: ( i) to assemble a compilation of high-resolution spectra of Galactic, unevolved (i.e. dwarfs), warm (spectral type F) stars, in a selected metallicity range (-1.0 less than or equal to> [Fe/H] less than or equal to -0.3), using the ESO 1.5m telescope and the FEROS spectrograph; ( ii) to carry out a Li survey among a sample of selected AGB stars, to investigate the possible correlation between Li-7 abundance (when detected) and mass-loss rate.
Free Keywords:galaxy : abundances; evolution; stars : nucleosynthesis; AGB; Mira
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astrophysik/Hydrodynamics
External Affiliations:Max Planck Inst Astrophys, Munich, Germany; Max Planck Inst Astrophys, Munich, Germany; Osserv Astrofis Arcetri, I-50125 Florence, Italy; Univ Granada, Granada, Spain; Monash Univ, Clayton, Vic 3168, Australia
Identifiers:ISI:000175921200044
ISSN:0004-640X
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