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Astron. Astrophys. 320, 497-499 (1997)

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Research Note

Variations of the Ap star HD 208217 *

J. Manfroid 1 and G. Mathys 2

1 Institut d'Astrophysique, Université de Liège, avenue de Cointe 5, B-4000 Liège, Belgium
2 European Southern Observatory, Casilla 19001, Santiago 19, Chile

Received 25 July 1996 / Accepted 12 September 1996

Abstract

We present a new determination of the rotation period of the Ap star HD 208217 based on photometric and magnetic measurements. The variations of this star are remarkable by the strong anharmonicity of its lightcurves in all colours as well as by the double wave of its mean magnetic field modulus variations.

Key words: stars: chemically peculiar – stars: individual: HD 208217 – stars: rotation

* based on observations made at the European Southern Observatory (La Silla, Chile; ESO programmes Nos. 53.7-028, 54.E-0416 and 55.E-0751)

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© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998
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