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Astron. Astrophys. 346, 537-541 (1999)

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Research Note

Monitoring of LPVs with an automatic telescope I: five new short period semiregular variables

T. Lebzelter

Institut für Astronomie der Universität Wien, Türkenschanzstrasse 17, A-1180 Wien, Austria

Received 23 September 1998 / Accepted 9 April 1999


We present light curves of five short period variables of spectral type M. They are the first result of our monitoring program of LPVs with an automatic telescope. The stars vary semiregularly on time scales of about 35 days and with small visual amplitude. It is shown that the Fourier analysis is only of limited use for this kind of stars. We conclude that this type of variability is more common among M giants than previously thought, and we briefly discuss these variables with the shortest periods among the SRVs.

Key words: stars: late-type – stars: oscillations – stars: variables: general

Send offprint requests to: lebzelter@astro.univie.ac.at

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© European Southern Observatory (ESO) 1999

Online publication: May 21, 1999