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Bimodality and Lithium Abundance on the Upper Main Sequence of the Open Cluster NGC 752

Published online by Cambridge University Press:  19 July 2016

J E Beckman  and
R. Rebolo
J E Beckman
Affiliation:
Instituto de Astrofisica de Canarias, 38200 - La Laguna, Tenerife, Spain.
R. Rebolo
Affiliation:
Instituto de Astrofisica de Canarias, 38200 - La Laguna, Tenerife, Spain.

Abstract

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Spectra of resolution λ/Δλ∼2 ×104 and good S:N ratio are presented in the range containing the 7Li doublet at 6707 Å for 9 main sequence or slightly evolved stars in NGC 752 (age ∼2 ×109 years). We investigate the suggested main sequence bimodality using spectroscopic indications of binarity and high rotational velocity, as well as the Li abundance to supplement previous photometry.

Type
VI. Chemical Composition of Stars
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 473 - 476
Copyright
Copyright © Kluwer 1988 

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