Search for Evolutionary Period Changes in the Double-mode Cepheid V367 Sctстатья
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Дата последнего поиска статьи во внешних источниках: 31 июля 2024 г.
Аннотация:For both periods of the bimodal Cepheid V367 Sct, O - C diagrams spanning a 113-year time interval are constructed. The O - C diagrams have the form of parabolas, allowing quadratic ephemerides and evolutionary period change rates to be determined for the first time, dP(Fu)/dt=+0.233 (+/- 0.020) s/yr and dP(1O)/dt=+0.244 (+/- 0.025) s/yr, for the fundamental tone and first overtone of V367 Sct, respectively, which are consistent with the results of theoretical computations for the third crossing of the instability strip. The test for stability of pulsations proposed by Lombard and Koen confirmed the reality of the evolutionary change of the periods.