On the pulsation amplitude of cepheid variables |
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| Authors: | N Nikolov Ts Tsvetkov |
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| Institution: | (1) Dept. of Astronomy, University of Sofia, Bulgaria |
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| Abstract: | On the basis of more abundant data a relation logP V/logR for cepheid variables (Fernie, 1965) is constructed. A linear relation between logP V and logR for classical cepheids is found, which perhaps has a break at R=10R
 . On the logR/logP diagram thes-cepheids (Efremov, 1968) show a distinct sequence. Alls-cepheids present a relative variation of the radii R/R 0.075. The existence of non-s-cepheids with R/R0.075 raises a point about the evolutionary place of these stars (see Efremov, 1968). One could suppose that cepheids with logP>1.1 pulsate in the first overtone. |
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