Numerical taxonomy of AP and AM stars

Details Numerical taxonomy of AP and AM stars Numerical taxonomy of AP and AM stars

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233..633c&link_type=abstract

Astrophysical Journal, Part 1, vol. 233, Oct. 15, 1979, p. 633-643. NSF-supported research.

Statistics

14

A Stars, Magnetic Stars, Metallic Stars, Stellar Spectra, Taxonomy, Abundance, Atomic Spectra, Classifications, Rare Earth Elements, Tables (Data)

Scientific paper

High-dispersion spectrograms of 40 Ap and Am stars have been classified on the basis of the second spectra of their lanthanide and iron-group elements with the help of cluster analysis. The atomic spectra have been described by the S parameters from wavelength-coincidence statistics. Useful classifications emerge from either the iron-group or lanthanide elements, but with the exception of the Am stars there is little coherence between these two groups of elements. The diversity among Ap stars is shown clearly.

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