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S E A R C H FOR R A P ID V A R I A B I L I T Y I N SPECTRUM O F A L P H A ANDROMEDAE

J. Zverko, J. Ziznovsky, M. Zboril, L. Hric Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranska Lomnica, Czechoslovakia N. S. Polosukhina, V. P. Halanushenko Crimean Astrophysical Observatory, Nauchny , Crimea, 334413, USSR V. D. Bychkov Special Astrophysical Observatory, Nizhnij Arkhyz, Stavropolskij Kraj , 357147, USSR I. Iliev, I. Barzova National Astronomical Observatory, p.o. box 136, 4700, Smolyan, Bulgaria

ABSTRACT Radial velocities of the Hg - Mn star Andromedae wer measured using the and CaII line on 27 high dispersion (2.7A/mm) spectrograms. While the radial velocities obtained from the Balmer lines showed no significant variations, those derived from the CaII line vary within the limits of 5 and 13 km/s. A freguency analysis of the Call RV values leads to two different frequences of 27.86 and 35.20 c/d. Their superposition results in a 196 min beat-phenomenon period. The halfwidth of the calcium line varies in a way which can be explained by nonradial oscillations. Malanushenko measured halfwidths, central depths and equivalent widths of the Call line on the same spectrograms. His results indicate a periodicity of 60 min. The complete text of this contribution will be published in the Proceedings of the X-th Regional Astronomy Meeting held in Praque, August 24-30, 1987.

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