摘要
１９９７年１１月-１２月，我们对昴星团盾牌座δ型变星Ｖ６４７Ｔａｕ及二个比较星进行了国际多址连续快速测光．分析结果表明Ｖ６４７Ｔａｕ具有５个激发脉动频率．这些频率包含了径向与非径向模式．１９７２年观测得出的主频ｆ＝２０．４０８次／天，已降至目前的第二个频率，且对应的脉动振幅也下降了．
he eighth STEPHI international multi-site campaign was devoted to the δ Scuti StarV647 Tau of the Praesepe Cluster and was carried in the period 1997 Nov 19-Dec 13.Analysis using two methods gave the same result. Five pulsation frequencies including bothradial and non-radial modes are excited in this star. The dominant frequency p = 20.408c/dobserved in 1972 has decreased to become the second frequency with a decreased amplitude.The global parameters show the star to be a young A type star just beginning core hydrogenburning.
基金
国家自然科学基金
