CN and CH variations among subgiants in the globular cluster 47 Tucanae

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/167484· OSTI ID:5711204

Smith, G H; Bell, R A; Hesser, J E ^[1]

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1. Space Telescope Science Institute, Baltimore, MD (USA)

A set of 28 giants and subgiants in the globular cluster 47 Tuc with absolute magnitudes between +1 and +2 have been observed. Variations in the strength of the 4215-A CN band are found in the sample, suggesting that CN variations exist among stars in all stages of post-turn-off evolution in 47 Tuc. Indices of the strength of CN and CH bands are derived from the spectra and compared with indices computed from synthetic spectra based on the model atmosphere computed by Gustafsson et al. (1975). The pattern of C and N variations among the 47 Tuc giants is shown to be dissimilar to that expected from observations of M92 by Carbon et al. (1982) and Langer et al (1986). 37 refs.

• OSTI ID: 5711204
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 341; ISSN ASJOA; ISSN 0004-637X
• 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
BOLOMETERS
CHEMICAL COMPOSITION
COMPARATIVE EVALUATIONS
CYANOGEN
DATA PROCESSING
GIANT STARS
MEASURING INSTRUMENTS
METHYLENE RADICALS
PROCESSING
RADICALS
SPECTROSCOPY
STAR CLUSTERS
STARS
VARIATIONS