Thee chemical compositions of stars in the globular cluster 47 Tucanae and the old disk cluster NGC 2420

Journal Article · Tue Jan 01 04:00:00 EST 1980 · Astrophys. J., Lett. Ed.; (United States)

DOI:https://doi.org/10.1086/183150· OSTI ID:5556475

Pilachowski, C A; Canterna, R; Wallerstein, G

The metallicities of the globular cluster 47 Tucanae and the old disk cluster NGC 2420 are redetermined from high-dispersion spectroscopy and from photometry with the Washington system. The mean iron deficiency of 47 Tucanae is -1.2, and oxygen is enriched relative to iron. The photometric data suggest that the CN or Ch bands are also enhanced. The iron deficiency of NGC 2420 is approximately -0.7, with no enrichment of oxygen. The impact of these results on the interpretation of globular cluster color-magnitude diagrams, and on theories of galactic chemical evolution, is discussed.

• Research Organization: University of Washington
• OSTI ID: 5556475
• Journal Information: Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 235:1; ISSN AJLEA
• 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
CARBON
CHEMICAL COMPOSITION
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
GIANT STARS
IRON
METALS
NONMETALS
OXYGEN
PHOTOMETRY
SPECTROSCOPY
STAR CLUSTERS
STARS
TRANSITION ELEMENTS