II、UX Ari和V711 Tau中可能的色球活动周期
Possible chromospheric activity cycles in II Peg, UX Ari and V711 Tau
摘要：
我们研究威尔逊山指数，我们间接从IUE的RS CVn型系统II Peg（K2 IV），UX阿里（K 0 IV + G5 V）和V711头（K1 IV + G5 V），广泛观察IUE从1978年至1996年的高，低分辨率光谱。我们分析的活动签名，这对应于主星，与Lomb-Scargle周期图。通过对V711 Tau卫星资料的分析，发现了一个可能的色球周期，其周期为18年，其中有一个短的近3年周期，这可能与色球翻转周期有关。II Peg的观测数据还显示了近21年的色球周期和约9年的翻转周期。最后，我们得到了一个可能的色球周期近6年的UX阿里。
英文摘要：
We study the Mount Wilson indices we obtained indirectly from IUE high and low resolution spectra of the RS CVn-type systems II Peg (K2IV), UX Ari (K0IV+G5V) and V711 Tau (K1IV+G5V), extensively observed by IUE from 1978 to 1996. We analyze the activity signatures, which correspond to the primary star, with the Lomb-Scargle periodogram. From the analysis of V711 Tau data, we found a possible chromospheric cycle with a period of 18 years and a shorter near 3-year cycle, which could be associated to a chromospheric flip-flop cycle. The data of II Peg also suggest a chromospheric cycle of near 21 years and a flip-flop cycle of 9 years approximately. Finally, we obtained a possible chromospheric cycle of near 6 years for UX Ari.
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