摘要
Jurkevich方法通常用来发现光变曲线的周期 ,并且根据V2 m 极小值的大小来验证所发现的光变周期可靠性。但是 ,这种验证方法又带有一定的不确定性 ,最佳的方法是把所发现的周期与观测光变曲线拟合 ,得出每一个周期的振幅 ,以振幅大小来验证所发现的光变周期的可靠性。将此方法用于OJ2 87的历史光变曲线 ,得到其最主要的周期为 11.9年 ,与其它结果相符合。
Usually Jurkevich method has been used to find periods of light curves and to test the periods by means of the values of their V 2 m. However, no firm rule exists for assessing the significance of a minimum in the V 2 m plot. A reasonable method used to evaluate periodicity is to fit trial periods to the historic light curves and then to get their amplitudes. We use this method to the historical light curve of OJ 287 and find that its main period is 11.9 years, which is in good agreement with the results obtained by other authors.
出处
《中国科学院上海天文台年刊》
2004年第25期97-103,共7页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
基金
上海市科学技术委员会项目 (0 2QA14 0 5 5 )
中国科学院光学天文开放实验室资助课题
