Lithium in the Hyades. I. New Observations
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1993
- DOI:
- 10.1086/173152
- Bibcode:
- 1993ApJ...415..150T
- Keywords:
-
- Lithium;
- Main Sequence Stars;
- Metallicity;
- Open Clusters;
- Stellar Structure;
- Spectral Line Width;
- Stellar Evolution;
- Astrophysics