耀变体PKS 2155-304的光学波段光变特性  

The Optical Variation of the Blazar Object PKS 2155-304

作　　者：杨海燕 李孝攀 罗玉辉 杨海涛 木繁[2] YANG Hai-yan;LI Xiao-pan;LUO Yu-hu;YANG Hai-tao;MU Fan(School of Physicsand Information Engineering,Zhaotong University,Zhaotong 657000,China;Oxbridge College,Kunming University of Science and Technology,Kunming 650106,China)

机构地区：[1]昭通学院物理与信息工程学院,云南昭通657000 [2]昆明理工大学津桥学院,云南昆明650106

出　　处：《云南师范大学学报（自然科学版）》2017年第6期1-5,共5页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：云南省教育厅科学研究基金资助性项目(2016ZZX230;2017ZZX079)

摘　　要：使用Swift卫星UVOT望远镜的观测数据,得到耀变体PKS 2155-304从2005年11月17日到2017年9月8日的光学U、B波段的光变曲线.应用Jurkevich方法对光变曲线进行周期特性分析,结果表明:PKS 2155-304在光学U波段可能具有237d的准周期性光变,B波段光变可能具有242d的准周期,该结果得到DCF方法的验证.通过DCF方法还发现光学U、B波段的光变具有强相关性,且无显著的时间延迟.This paper uses the Swift satellite UVOT telescope observation data to obtain the light curve of PKS2155304on optical U band and B band from November17,2005to September8,2017.Jurkevich method is applied to the light curve,the analysis results show that the PKS2155304on optical U band could have237days of quasi periodicity,B band could have242days of quasi periodicity.The results are validated by DCF method.The DCF method also found that optical U band and B band were strongly correlated without significant time delay.

关 键 词：PKS2155-304 JURKEVICH方法 DCF方法 光变周期 相关性 

分 类 号：P157.6[天文地球—天文学]