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Search for Evolutionary Changes in the Periods of Cepheids: V532 Cyg
Astronomy Letters ( IF 1.1 ) Pub Date : 2019-12-16 , DOI: 10.1134/s1063773719100013
L. N. Berdnikov

For the low-amplitude Cepheid V532 Cyg we have constructed an O − C diagram spanning a time interval of 121 years. The O − C diagram has the shape of a parabola, which has made it possible to determine for the first time the quadratic light elements and to calculate the rate of evolutionary decrease in the period, dP/dt = −0.248 (±0.067) s yr−1, which points to the second crossing of the instability strip. The pulsation stability test proposed by Lombard and Koen (1993) has confirmed that the period decrease is real.

中文翻译:

寻找造父变星时期的进化变化:V532 Cyg

对于低振幅造父变星V532 Cyg,我们构建了一个跨度为121年的OC图。的-O - Ç图具有一个抛物线,这使得有可能的形状来确定用于第一次二次光元件,并计算进化下降时间段中的速度,的dP / dt的= -0.248(±0.067)类yr -1,它指向不稳定性带的第二个交叉点。Lombard和Koen(1993)提出的脉动稳定性测试已证实周期减小是真实的。
更新日期:2019-12-16
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