Astron. Astrophys. 358, 287-298 (2000)

Search for Doradus variable stars in the Pleiades cluster

S. Martín and E. Rodríguez

Instituto de Astrofísica de Andalucía, CSIC, P.O. Box 3004, 18080 Granada, Spain

Received 5 October 1999 / Accepted 24 March 2000

Abstract

Photometric observations in the system of A-F type stars in the Pleiades cluster have been performed in order to detect pulsating variable stars of Doradus type in the lower part of the Cepheid instability strip. In order to obtain more information about the behaviour of the studied objects and to be able to distinguish between long period variable and non-variable stars, two statistical methods have been developed. Several of these stars show some type of variability but only two of the observed objects, H1284 and S29, can be safely classified as Dor stars. Furthermore, these observations have provided us with Strömgren and H photometry, non-existing up to now for some of them, which permitted us to perform a photometric study of the Pleiades cluster.

Key words: stars: variables: general Galaxy: open clusters and associations: individual: Pleiades methods: statistical techniques: photometric

Send offprint requests to: S. Martín (susana@iaa.es)

© European Southern Observatory (ESO) 2000

Online publication: June 26, 2000

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