Other
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...269..580b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 269, June 15, 1983, p. 580-591.
Other
85
Dwarf Stars, Globular Clusters, Stellar Spectrophotometry, Subgiant Stars, Abundance, Cn Emission, Nitrogen, Stellar Magnitude
Scientific paper
The evolved stars in the metal-rich globular cluster 47 Tucanae exhibit a range of CN band strengths. This conclusion is based on low-dispersion spectroscopy and DDO photometry. Spectroscopic data suggest that CN strength variations occur in the subgiants and in stars which are only slightly evolved. The present investigation is concerned with a further program of observations of faint 47 Tuc stars. This program was partly undertaken because new instrumental developments have made it possible to obtain spectra with much higher resolution than those available in the earlier studies. SIT vidicon spectra at 4 A resolution were obtained for 11 dwarf stars in 47 Tuc, as well as for five brighter subgiants, in a continuing survey of the behavior of CN (and other strong) features among turnoff region stars.
Bell Roger A.
Cannon Russell D.
Hesser James Edward
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