A Possible Periodicity in the Radio Light Curves of 3C 120

MAO Li-Sheng. A Possible Periodicity in the Radio Light Curves of 3C 120[J]. Astronomical Research and Technology, 2007, 4(4): 307-312.

Citation:

MAO Li-Sheng. A Possible Periodicity in the Radio Light Curves of 3C 120[J]. Astronomical Research and Technology, 2007, 4(4): 307-312.

Citation:

MAO Li-Sheng. A Possible Periodicity in the Radio Light Curves of 3C 120[J]. Astronomical Research and Technology, 2007, 4(4): 307-312.

Abstract

In this paper, using two methods (The Jurkevich method and the Power Spectral Analysis method), the radio variability of Seyfert galaxy 3C 120 at five radio bands (4. 8, 8, 14. 5, 22 and 37 GHz) are studied. A periodicity about 4. 20±0. 12 a(year) during post-1978 epoch was found for all the five radio bands. This periodicity probably can be explained by the double black hole model.

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