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Astron. Astrophys. 357, 548-552 (2000)

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uvby photometry of the magnetic CP stars HD 36668, 36 Lyncis, HD 86592, and HR 8861 *

Saul J. Adelman

Department of Physics, The Citadel, 171 Moultrie Street, Charleston, SC 29409, USA

Received 26 January 2000 / Accepted 29 February 2000


Differential Strömgren uvby photometric observations from the Four College Automated Photoelectric Telescope (FCAPT) are presented for the magnetic CP stars HD 36668, 36 Lyn, HD 86592, and HR 8861. Using the FCAPT values, North's period for HD 36668 is refined to 2.11884 days. The 3.834 day period of Shore et al. for 36 Lyn, which was found from magnetic field measurements, is confirmed by photometry. The FCAPT observations also support the 2.8867 day period of Babel & North for HD 86592, demonstrate that this star is a large amplitude variable in v (0.13 mag.), and show that y varies crudely out of phase from u , v , and b which are in phase with one another. The variability of HR 8861 appears to be correlated with the meridional passages of regions of Si over- and underabundance as found by Piskunov et al.

Key words: stars: individual: HD 36668 – stars: individual: 36 Lyn – stars: individual: HD 86592 – stars: individual: HR 8861 – stars: chemically peculiar

* Tables 2, 3, 4 and 5 are only available in electronic form at the CDS via anonymous ftp to ftp://cdsarc.u-strasbg.fr/pub/cats/J/A+A/357/548 ( or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/357/548

Send offprint requests to: S.J. Adelman

© European Southern Observatory (ESO) 2000

Online publication: June 5, 2000