Long-term Periodicity Analysis of Polarization Variation for Radio Sources

Details Long-term Periodicity Analysis of Polarization Variation for Radio Sources Long-term Periodicity Analysis of Polarization Variation for Radio Sources

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011japa...32...43y&link_type=abstract

Journal of Astrophysics and Astronomy, Volume 32, Issue 1-2, pp. 43-46

Astronomy and Astrophysics

Astrophysics

Galaxies, Blazars, Periodicity Analysis

Scientific paper

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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