Period variations of Cepheids and stellar evolution. Astronomy at the epoch of multimessenger studies, Proceedings of the VAK-2021 conference, ed. Cherepashchuk, A.M., et al., Moscow: SAI MSU and INASANm 2021, p. 9-14статьяИсследовательская статья
Дата последнего поиска статьи во внешних источниках: 8 апреля 2022 г.
Аннотация:Classical Cepheids are pulsating supergiants in the main instability strip. In the course of evolution, they move across the instability strip, and their periods vary. Studying theirperiod variations for a time span of several decades, it is possible to determine the rate of secular period increase or decrease, identify the number of instability strip crossing, andthus improve the period--luminosity relation. Special tests are used to determine whether the observed period variation is real or caused by random errors.