Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-03-06
Astronomy and Astrophysics
Astrophysics
11 pages, 8 encapsulated Postscript figures. Accepted for publication on A&A main journal
Scientific paper
We investigate the evolution of metal deficient stellar structures, presenting H-burning isochrones covering cluster ages from 800 Myr to 7 Gyr. Evolutionary evidences for selection effects in the metallicity distribution of very metal poor H-burning red giants are reported. The evolution of stars during central and shell He burning is further investigated, discussing the occurrence of He burning pulsators as a function of cluster age.
Cassisi Santi
Castellani Marco
Castellani Vittorio
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