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eJAAVSO

Variability in Ap Stars

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James M Huntley

Leander McCormick Observatory, University of Virginia, Charlottesville, Virginia

 

Abstract

 

It can be estimated that nearly half of all spectral type A stars are not normal. Normality is defined by many criteria; hence normality in stellar classification is not a simple concept. Some of the observational data presently available for the peculiar A, or Ap, and the metallic A, or Am stars in Table I will illustrate this point.

 

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