Long-term Periodicity Analysis of Polarization Variation for Radio Sources

Journal of astrophysics and astronomy

Yuhai Yuan1¹ 

[1] Center for Experiment, Guangzhou University, Guangzhou, Guangdong 510006, People’s Republic of China.$$

关键词: Galaxies;    blazars;    periodicity analysis.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

We use the database of University of Michigan Radio Astronomy Observatory (UMRAO) at three radio bands (4.8, 8 and 14.5 GHz) to analyse the long-term polarization variation in search of the possible periodicity. Using the power spectral analysis method (PSA), the Jurkevich method and the discrete correlation function (DCF) method, we find that there are 16 sources lying in periodicity. The results show the astrophysically meaningful periodicity covering 2.1 years to 16.2 years at 4.8 GHz, 2.8 years to 16.3 years at 8 GHz, and 1.8 years to 16.6 years at 14.5 GHz.

【 授权许可】

Unknown