Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..752..154c&link_type=abstract
STELLAR ASTROPHYSICS WITH THE WORLD'S LARGEST TELESCOPES: First International Workshop on Stellar Astrophysics with the World's
Astronomy and Astrophysics
Astrophysics
Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages, Giant And Subgiant Stars, Eclipsing Binaries
Scientific paper
I describe how recent observations of metal-poor stars made with large telescopes have lead to new insights into the evolution of metal-poor stars. High dispersion [Fe/H] studies of sub-giant and main sequence turn-off stars in globular clusters have demonstrated that diffusion is inhibited in the envelope of metal-poor stars. This is a puzzling result, as helioseismology provides strong evidence that envelope diffusion occurs in the Sun. Observations of detached double-lined eclipsing binaries allow one to determine the mass and radius of the stars and hence, provide a critical test of stellar evolution models. Observations of detached double-lined eclipsing binaries which are in the main sequence turn-off region of the globular cluster Omega Cen are compared to theoretical stellar evolution models.
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