The Pleiades' age and the sequential star formation

Details The Pleiades' age and the sequential star formation The Pleiades' age and the sequential star formation

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...213l...1m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 213, no. 1-2, April 1989, p. L1-L4.

Astronomy and Astrophysics

Astrophysics

34

Pleiades Cluster, Star Formation, Stellar Evolution, Stellar Models, Hertzsprung-Russell Diagram, Main Sequence Stars, Pre-Main Sequence Stars, Stellar Color, Stellar Luminosity, Stellar Mass

Scientific paper

A new age of the Pleiades has been obtained, comparing the cluster HR diagram with the isochrones derived from the overshooting evolutionary models with chemical composition Y = 0.28, Z = 0.02. This comparison gives an age for the cluster of 1.5 x 10 to the 8th yr, instead of 6-7 x 10 to the 7th derived in these last years from the classical evolutionary models. This new value reduces drastically the difference between the age derived with the premain-sequence evolutionary models (turn-on age) and that derived with the new main-sequence models (turn-off age): a strong argument in favor of the sequental star formation hypothesis thus fails.

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