H and He burning phases in galactic clusters: The role of the original chemical composition

Details H and He burning phases in galactic clusters: The role of the original chemical composition H and He burning phases in galactic clusters: The role of the original chemical composition

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...282..753c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 282, no. 3, p. 753-759

Astronomy and Astrophysics

Astrophysics

22

Galactic Clusters, Helium, Hertzsprung-Russell Diagram, Hydrogen, Metallicity, Stellar Composition, Stellar Evolution, Thermonuclear Reactions, Abundance, Color-Magnitude Diagram, Galactic Evolution, Stellar Models

Scientific paper

We present cluster isochrones for selected assumptions about the cluster metallicity and original He content, covering the range of ages between 40 and 5000 Myr. We show that moderate variations in the star metallicity or in their original He abundance do not affect sensitivity the expected C-M diagrams. Evolutionary parameters constraining the cluster age or the cluster distance modulus are finally discussed.

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