Other
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977pasp...89..415c&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 89, June-July 1977, p. 415-423.
Other
2
Abundance, Factor Analysis, Giant Stars, Multivariate Statistical Analysis, Stellar Spectrophotometry, Chemical Composition, Chemical Evolution, Galactic Evolution, K Stars, Nuclear Fusion, Stellar Atmospheres, Stellar Evolution
Scientific paper
Multivariate analysis is applied to various photometric indices of K stars in order to determine the number of independent factors that account for the variations observed in the data. Temperature is found to be the overwhelmingly dominant factor, so low-resolution scanner observations of 26 K0 stars are analyzed to reduce the temperature domination. Factor analysis of various combinations of continuum colors yields one dominant factor ('index one') that is correlated with temperature and gravity but not with abundance. Two significant factors are obtained from factor analysis of the five reddest continuum colors; one is shown to be basically equivalent to index one, and the other is identified as an abundance factor. The possible existence of a third factor that may be a measure of CN abundance variation is indicated.
Christian Carol A.
Janes Kenneth A.
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