食双星Y Leo光变周期的研究  

Investigation on the Photometric Period of the Eclipsing Binary Y Leo

作　　者：袁金照 YUAN JIN-Zhao(College of Physics and Information Engineering,Shanxi Normal University,Linfen 041000,Shanxi,China)

机构地区：[1]山西师范大学物理与信息工程学院

出　　处：《山西师范大学学报（自然科学版）》2019年第3期35-39,共5页Journal of Shanxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(U1231121)

摘　　要：对食双星YLeo进行了测光观测,并结合文献中的数据,发现YLeo的光变周期表现出了复杂的变化,包括一个长期增加的趋势和周期性的震荡成分.前者可能是主星的星风损失造成的,而周期性的震荡成分应该是由第三天体引起的.对光变极小时刻进行拟合,发现在距离食双星31.62au的地方存在一个质量为1.33个太阳质量的第三天体,轨道周期为79.12年.此外,在第三天体的内侧,在距离食双星6.95au的地方可能存在一个质量为0.69太阳质量的第四天体,轨道周期为9.50年.Photometric observations of eclipsing binary Y Leo were carried out, and all of available data of Y Leo in the literature were collected, Complicated variations are found in its period, including a long-term increasing and cyclical variations. The former may arise from stellar wind, and the latter is due to a third body with a mass of 1.33 Solar masses, which rotates around the eclipsing pair with a period of 79.12 years and a semimajor axis of 31.62 au. Additionally, a fourth body with a mass of 0.69 Solar masses is possible inside the third body. Its semimajor axis is 6.95 au, and the orbital period is 9.50 years.

关 键 词：食双星 恒星(YLeo) 多体系统 

分 类 号：P153[天文地球—天文学]