用磁场望远镜研究太阳振荡的初步结果

The Primary Results of Research on Solar Oscillations by Using Magnetic Field Telescope

本文分析了北京天文台磁场望远镜λ5324速度场的时间序列资料,分别得到了带状模式及扇形模式的(l-v)二维功率谱。在这两种谱中,存在着五分钟振荡及周期在10分钟以上的长周期振荡。我们从长周期振荡中证认出球谐度为10<l<60的f模式、p_1及p_2模式。同时,两种谱都表明存在l=12±2及l=20±2,而周期均为48.3分钟的振荡。由诊断图可大致证认出它们分别属于n=7及n=10的g模式。

The lime series data of λ 5324.19 A velocity field from Magnetic Field Telescope, at Beijing Observatory, have been analysed. Two (l-v) spectrum for zonal modes and sectorial modes were obtained respectively. Five-minute oscillation and the oscillation with period longer than ten minutes exist in both power spectrum. From the power spectrum, we have recognized f mode, p1 modes and p2 modes with the degree between 10 and 60. Also, both power spectrum indicate the oscillations with period of 48.3 minutes and degree l equal to 12 and 20, they can be classfied into g modes with order n probably equal to 7 and 10 respectively.