Abundance of lithium in old galactic clusters. I. NGC 7789

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163802· OSTI ID:5525636

Pilachowski, C

In the present comprehensive study of the abundance of Li in the moderately old galactic cluster NGC 7789, the value obtained for stars on the main-sequence turnoff is cosmic, or log epsilon (Li) = 3.0, while some evidence exists of Li depletion or dilution in stars just beyond the turnoff. In most of the NGC 7789 giants, Li is more abundant than average for low mass giants; this is probably due to the higher mass. The decline in Li abundance with effective temperature in the cluster giants can probably be attributed to the destruction of Li at the base of the convective envelope. The giant star Kuestner 301 is tentatively identified as a weak G-band star, on the basis of its exceptionally high Li abundance. 47 references.

• Research Organization: Kitt Peak National Observatory, Tucson, AZ
• OSTI ID: 5525636
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 300; ISSN ASJOA
• 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
DATA
ELEMENTS
EXPERIMENTAL DATA
GIANT STARS
INFORMATION
LITHIUM
METALS
NUMERICAL DATA
RED GIANT STARS
STAR CLUSTERS
STARS