Pulsational changes in classical cepheid X Cygni
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Using an extensive archive for visual observations from the AAVSO, along with published times of maximum light, we determined a new model for the period of X Cygni. The best...
本研究依托美国变星观测者协会（American Association of Variable Star Observers, AAVSO）的大规模目视观测档案，结合已发表的光极大时刻数据，为天鹅座X星（X Cygni）构建了全新的光变周期模型。最优的……
