Lithium abundances and metallicities in stars near the main-sequence turnoff and a giant in M67

Journal Article · Thu Dec 01 04:00:00 EST 1988 · Publ. Astron. Soc. Pac.; (United States)

DOI:https://doi.org/10.1086/132354· OSTI ID:5892369

Garcia Lopez, R J; Rebolo, R; Beckman, J E

The iron abundance of seven stars near the main-sequence (MS) turnoff and a giant in M67 are spectroscopically derived, and the results are discussed. The resulting mean iron abundance of the turnoff stars is (Fe/H) = 0.04 + or - 0.04. Taken together with previous determinations for younger clusters, this shows that there has been relatively little change of the iron abundance in the solar neighborhood during the last 5 Gyr. Lithium was detected in one unevolved star and marginally in the giant, while in the other MS stars only upper limits were found. The considerable differences in Li abundances for stars with similar surface temperature imply that there is at least one parameter affecting Li depletion apart from stellar mass and metallicity. Nonsimultaneous star formation in the cluster cloud explain the scatter in lithium abundances. 50 references.

• Research Organization: Instituto de Astrofisica de Canarias, La Laguna (Spain)
• OSTI ID: 5892369
• Journal Information: Publ. Astron. Soc. Pac.; (United States), Journal Name: Publ. Astron. Soc. Pac.; (United States) Vol. 100; ISSN PASPA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ALKALI METALS
ALKALINE EARTH METALS
CALCIUM
CHEMICAL COMPOSITION
ELEMENTS
GALAXIES
GIANT STARS
IRON
LITHIUM
MAIN SEQUENCE STARS
MASS
MATHEMATICAL MODELS
METALS
MILKY WAY
SPECTRA
STAR CLUSTERS
STAR EVOLUTION
STARS
TRANSITION ELEMENTS