Long-term Periodicity Analysis of Polarization Variation for Radio Sources

被引：0
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作者：
Yuhai Yuan
机构：
[1] Guangzhou University,Center for Experiment
来源：
Journal of Astrophysics and Astronomy | 2011年 / 32卷
关键词：
Galaxies; blazars; periodicity analysis;
D O I：
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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.
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