摘要
收集了BL Lac天体Mrk 421光学V波段从2008年10月至2016年12月间共487个观测数据点,获得了光学V波段的变化曲线.用离散相关函数(DCF)方法和Jurkevich方法进行了周期分析,发现Mrk 421在光学V波段存在约(585±15)d的中短时标光变周期,并利用理论模型探讨了引起光变现象的可能原因.
487 data of BL Lac object Mrk 421 in the optical V band were collected from the database of the Steward Observatory Fermi Blazar Monitoring Project,and its light curve of the V band from October 2008 to December 2016 was constructed.Using the discrete correlation function(DCF)method and Jurkevich′s method to analyze the data,we find that the V band curve variability period of BL Lac Mrk 421 is(585±15)days.We have discussed the causes of the light variability phenomenon from the theoretical model.
作者
毕雄伟
蔡群
田家金
葛树萍
BI Xiong-wei CAI Qun TIAN Jia-jin GE Shu-ping(Department of Physics, Honghe University, Mengzi 661199, China)
出处
《云南师范大学学报(自然科学版)》
2017年第2期1-5,共5页
Journal of Yunnan Normal University:Natural Sciences Edition
基金
云南省教育厅科研基金资助项目(2014Y463)
中国科学院天体结构与演化重点实验室开放课题资助项目(OP201501)