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Astron. Astrophys. Suppl. Ser. 146, 13-17
uvby photometry of the magnetic CP stars 20 Eridani, HR 1297, 12 Canis Majoris,
and HD 134214![[*]](/icons/foot_motif.gif)
Saul J. Adelman
Send offprint request: Saul J. Adelman
Department of Physics, The Citadel, 171 Moultrie Street,
Charleston, SC 29409, U.S.A.
Received May 2; accepted June 15, 2000
Abstract:
Differential Strömgren
uvby observations from the Four College
Automated Photoelectric Telescope (FCAPT) are presented for the mCP stars 20
Eri, HR 1297, 12 CMa, and HD 134214. Adelman & Boyce found suggestions that
the light curves of 20 Eri change between observing seasons. Observations for
two additional seasons confirm this behavior and lead to an improved period of
1.928890 days. For HR 1297 a new period of 15.7490 days was derived. The
uvby light curves now appear to be the same for different observing
seasons. 12 CMa is found to be a photometric variable with the 2.18010 day
period determined from magnetic measurements by Bohlender et al. Observations
of the rapidly oscillating Ap star HD 134214 confirm the lack of photometric
variability which is not associated with the rapid oscillations.
Key words: stars: chemically peculiar -- stars: individual: 20 Eri -- stars:
individual: HR 1297 -- stars: individual: 12 CMa -- stars: individual:
HD 134214
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