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$$\boldsymbol{BVI}_{\boldsymbol{c}}\boldsymbol{g^{\prime}r^{\prime}i^{\prime}}$$ Observations and Search for Evolutionary Changes in the Period of the Cepheid V1467 Cyg
Astronomy Letters ( IF 1.1 ) Pub Date : 2020-08-28 , DOI: 10.1134/s1063773720030019 L. N. Berdnikov , A. A. Belinskii , E. N. Pastukhova , M. A. Burlak , N. P. Ikonnikova , E. O. Mishin
中文翻译:
$$ \ boldsymbol {BVI} _ {\ boldsymbol {c}} \ boldsymbol {g ^ {\ prime} r ^ {\ prime} i ^ {\ prime}} $$在观测期间观察和寻找进化变化造父变星V1467 Cyg
更新日期:2020-08-28
Astronomy Letters ( IF 1.1 ) Pub Date : 2020-08-28 , DOI: 10.1134/s1063773720030019 L. N. Berdnikov , A. A. Belinskii , E. N. Pastukhova , M. A. Burlak , N. P. Ikonnikova , E. O. Mishin
Abstract
\(BVI_{c}g^{\prime}r^{\prime}i^{\prime}\) observations of the classical Cepheid V1467 Cyg have been obtained with the 60-cm telescope at the Caucasus Mountain Observatory of the SAI MSU. Invoking all of the available photometry has allowed an \(O-C\) diagram spanning a time interval of 107 years to be constructed. This has made it possible to calculate for the first time the rate of evolutionary decrease in the period of V1467 Cyg, \(dP/dt={-}431.5({\pm}{8.2})\) s yr\({}^{-1}\), in agreement with the results of model calculations for the second crossing of the instability strip. The pulsation stability test proposed by Lombard and Koen has confirmed that the evolutionary changes in the period are real.中文翻译:
$$ \ boldsymbol {BVI} _ {\ boldsymbol {c}} \ boldsymbol {g ^ {\ prime} r ^ {\ prime} i ^ {\ prime}} $$在观测期间观察和寻找进化变化造父变星V1467 Cyg