Comparative studies of young open clusters. III - Empirical isochronous curves and the zero age main sequence

Details Comparative studies of young open clusters. III - Empirical isochronous curves and the zero age main sequence Comparative studies of young open clusters. III - Empirical isochronous curves and the zero age main sequence

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....97..235m&link_type=abstract

Astronomy and Astrophysics, vol. 97, no. 2, Apr. 1981, p. 235-244.

Astronomy and Astrophysics

Astrophysics

350

Early Stars, Main Sequence Stars, Open Clusters, Stellar Evolution, Astronomical Catalogs, Cepheid Variables, Hertzsprung-Russell Diagram, Red Giant Stars, Ubv Spectra

Scientific paper

A complete set of empirical isochronous curves is presented for 14 groups of open clusters younger than the Hyades. The U-B/B-V relation and the ZAMS have been reexamined, and the present results confirm the sequence of Blaauw (1963) while contradicting the revision proposed by Eggen (1976). Absolute ages for each age group have been obtained from an age calibration based on a new grid of evolutionary models by Maeder (1981). Stellar evolution in the red giant region is discussed.

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