2006 Supplement 2: 2005 LAKE HANAS INTERNATIONAL PULSAR SYMPOSIUM / Fan

Radio Variability Properties of a Sample of 168 Radio Sources: Periodicity Analysis

J. H. Fan, Y. Liu, Y. H. Yuan, H. G. Wang, Y. X. Wang, A. C. Gupta, J. H. Yang, J. Li, J. L. Zhou, S. X. Xu, J. L. Chen, F. Liu, Y. Z. Li

Abstract


In this work, using the data base at the University of Michigan Radio Astronomy Observatory (UMRAO) at 8 GHz, we investigated the possible periodicity in the radio light curves using Jurkevich analysis method. The results show that the radio sources display a possibly physically significant periodicity in a range of 0.08 to 14.5 years. Besides, the radio spectral indexes are also calculated, the results show that the averaged radio spectral index is α4.814.5 = −0.15 (fν∝να) for flat spectrum radio quasars (FSRQs) and α4.814.5=0.01 for BL Lacertae objects. Some discussions are included.


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DOI: https://doi.org/10.1088/1009-9271/6/S2/62

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