Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ap%26ss.284..779n&link_type=abstract
Astrophysics and Space Science, v. 284, Issue 2, p. 779-782 (2003).
Astronomy and Astrophysics
Astrophysics
1
Galaxy, Halo Stars, Chemical Abundances, Nucleosynthesis, Radioactive Cosmochronolgy, Galactic Evolution, Heavy Elements
Scientific paper
New, precise abundance data for a large number of elements in a growing sample of extremely metal-poor stars are accumulating from the new 8-m telescopes. Combined with theoretical models, these results advance our understanding of the first generations of stars, whose nucleosynthesis products are fossilised in the oldest stars we see today and thus give clues to the earliest phases of evolution in the Galaxy. In particular, the heaviest elements give us insight into the different neutron capture mechanisms and the stellar sites where such elements could be produced. They also afford an independent way to determine the age of the Galaxy, by radioactive chronology.
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