盾牌座δ型变星V647 Tau的脉动频率──第八次STEPHI联测结果  

Multi-Site Observation of the δScuti Star V647 Tau.Result of The Eighth STEPHI Campaign

作　　者：刘燕英[1,2] 刘燕英 E.Michel M.M.Hernandez M.Alvarez M.Chevreton[1] 周爱英[1] 李治平 方明骏 C.Barban 

机构地区：[1]中国科学院北京天文台,北京100080 [2]中国科学院-北京大学联合北京天体物理中心,北京大学100871

出　　处：《天体物理学报》1999年第2期201-212,共12页

基　　金：国家自然科学基金

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.

关 键 词：变星 盾牌座δ型变星 测光 脉动频率 

分 类 号：P145.2[天文地球—天体物理]