Search for spectral variability of a sample of CP stars and phase relations among light, spectral and magnetic variations.
Tools: spectroscopic observations of HeI l 5876 Å equivalent width variations.
Results from this studies have been published in:Variability of the HeI l5876 Å line in early type chemically peculiar stars. Paper II
G. Catanzaro, F. Leone
2003, Astronomische Nachritchen, 324, 445
Variability of the HeI l5876 Å
line in early type chemically peculiar stars
Here are some examples from Paper I (click to blow up):
and from Paper II (click to blow up):