A&A Supplement series, Vol. 122, April II 1997, 249-253
Received June 14; accepted July 22, 1996
S.J. Adelman
Send offprint request: S.J. Adelman
(adelmans@citadel.edu)
Department of Physics,
The Citadel,
171 Moultrie Street,
Charleston, SC 29409, U.S.A.
Differential Strömgren uvby photometric observations
from the Four College Automated Photoelectric Telescope refine
the rotational periods and define the shapes of the light curves
of four magnetic Chemically Peculiar stars. HD 32633 (
) exhibits an in-phase variability with asymmetrically
shaped light curves. 25 Sex (
) has a complex
variability with the v, b, and y light variability crudely in phase,
but quite different from that of u. HR 7224 (
)
shows in-phase variability with two nearly equal secondary
minima. HD 200311 (
), which was previous
thought to be a long period variable, is found to be a modest
photometric variable.
keywords: stars: individual: HD 32633 -- stars: individual: 25 Sex -- stars: individual: HR 7224 -- stars: individual: HD 200311 -- stars: chemically peculiar