Period variation of selected cepheids |
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| Authors: | József Vinkó |
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| Institution: | (1) Department of Physics, JATE University, Szeged, Hungary;(2) Konkoly Observatory of the Hungarian Academy of Sciences, Budapest, Hungary |
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| Abstract: | The aim of the present paper is to study the period as well as  -velocity changes of 12 cepheid-type variable stars in order to find possible evidence for duplicity. Light-time effect was found in the O-C diagram of RY CMa, the orbital period being about 5200 days. Furthermore, especially spectroscopic observations are needed to confirm the duplicity or render the accurate orbital solution possible. |
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