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：

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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。