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Paper: How Many Parameters Are Required to Describe a Star? Principal Component Analysis as an Astrophysical Tool
Volume: 154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop
Page: 818
Authors: Dobson, Andrea K.; Donahue, Robert A.
Abstract: Various lines of evidence suggest that more than three observables are required for adequate representation of the state of a star. We apply Principal Component Analysis (PCA) to the question of the statistical determination of the number of observables required to describe stars of various types. Synthetic colors produced by Kurucz for several model stellar atmospheres are used to demonstrate the usefulness of the method. We then consider results obtained when PCA is carried out on a sample of stars from several photometric catalogs.
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