天鹅座P星光变曲线的周期性--双星伴星的指示？
Periodicity in the Light Curve of P Cygni - Indication for a Binary Companion?
摘要：
我们使用观测的发光蓝变量（LBV）天鹅座P跨越七十年，随着信号处理方法，以确定恒星光度的周期性。我们发现一个明显的周期$4.7 \pm 0.3$年与较短的周期。这种周期性是一个可能的迹象，表明一个双星伴星从密集的LBV风中通过了类似日食的事件，如果是这样，这是第一个观测迹象表明天鹅座P是一个双星系统。这可能支持模型，有助于巨大的LBV爆发与双伴侣的相互作用。我们还讨论了周期性的其他解释。
英文摘要：
We use observations of the Luminous Blue Variable (LBV) P Cygni spanning seven decades, along with signal processing methods, to identify a periodicity in the stellar luminosity. We find a distinct period of $4.7 \pm 0.3$ years together with shorter periods. The periodicity is a possible indication of a binary companion passing in an eclipse-like event from the dense LBV wind, and if so it is the first observational indication that P Cygni is a binary system. This may support models that contribute giant LBV eruptions to interaction with a binary companion. We discuss other interpretations for the periodicity as well.
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