Long term periodicity analysis of the spectral index of 2251+158

被引：0
|
作者：
Yu-Hai Yuan1
2 Center for Astrophysics
机构：
来源：
ResearchinAstronomyandAstrophysics | 2011年 / 11卷 / 03期
基金：
中国国家自然科学基金;
关键词：
blazars:data analysis:individual+158;
D O I：
暂无
中图分类号：
P141 [实测天体物理学];
学科分类号：
摘要：
We analyze the radio spectral index of blazars from the University of Michigan Radio Astronomy Observatory database,and find that there exists quasiperiodic activity in 2251+158.The long-term periodicity analysis is accomplished by three methods,which are the Jurkevich method(Jurkevich),the discrete correlation function(DCF),and the Periodogram method(P).The results show that 2251+158 has two strong periodicities,which are P1=6.3±1.1 yr and P2=3.8±1.2 yr.
引用
收藏
页码：286 / 292
页数：7
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