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Search for Evolutionary Changes in the Periods of Cepheids: BY Cas |
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| Authors: | Berdnikov L. N. |
| Affiliation: | 1.Sternberg Astronomical Institute, Moscow State University, Universitetskii pr. 13, Moscow, 119992, Russia ; |
| Abstract: | Astronomy Letters - For the low-amplitude Cepheid BY Cas we have constructed an O ? C diagram spanning a time interval 123 years. The O ? C diagram has the shape of a parabola, which... |
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