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spectrum variables

(α² CVn stars) Peculiar main-sequence Ap stars whose spectra have anomalously strong lines of metals and rare earths (Sr, Eu, Mn, Si, Cr) that vary in intensity by about 0.1 magnitudes over periods of about 1–25 days. These variations are related to changes in the stars' magnetic fields. The brighter component of the binary star Cor Caroli (α² CVn) is typical.

Collins Dictionary of Astronomy © Market House Books Ltd, 2006

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References in periodicals archive

Analysis of the ESR spectra revealed substantial differences in spectrum variables between patients with cancer and healthy individuals and those with chronic disease.

Electron spin resonance spectroscopy of serum albumin: a novel new test for cancer diagnosis and monitoring

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