Lithium in the Hyades. I - New observations

Details Lithium in the Hyades. I - New observations Lithium in the Hyades. I - New observations

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...415..150t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 415, no. 1, p. 150-173.

Astronomy and Astrophysics

Astrophysics

174

Lithium, Main Sequence Stars, Metallicity, Open Clusters, Stellar Structure, Spectral Line Width, Stellar Evolution

Scientific paper

Results are presented of new observations, carried out at Li 6707 A, on 68 main-sequence members of the Hyades cluster with spectral types ranging from late F to and early K, and their surface lithium abundance Li/H is related to their mass, age, and initial composition. It is found that, for the sample as a whole, the observed distribution of lithium abundances is inconsistent with the hypothesis of a unique relationship between lithium abundance and mass. Moreover, is strong observational evidence for main-sequence lithium depletion when the data are compared with observations in younger clusters, even for masses that are not predicted to experience such depletion in standard stellar models.

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