Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009pasp..121.1172l&link_type=abstract
The Publications of the Astronomical Society of the Pacific, Volume 121, Issue 885, pp. 1172-1179.
Astronomy and Astrophysics
Astronomy
Quasars And Active Galactic Nuclei, Quasars And Active Galactic Nuclei
Scientific paper
We have analyzed the light curves of 3C 279 at 22 GHz, 37 GHz, optical R band, and X-ray (2-10 KeV), and found evidence of quasi-periodic outbusts. The light curves show that 3C 279 is an extremely active object. A period of P=130.6±1.3 days was consistently confirmed by three methods: the power-spectrum method, the discrete correlation function (DCF) method, and the Jurkevich method. Based on the relationship between observed period P and the precession period P given by Rieger and our result, the precession period of jet in 3C 279 is P≃29.6 yr, which is completely consistent with the precession period of jet of about 30 yr obtained by Carrara et al.. This suggests that there is a precession jet in 3C 279 and the variability period of about 130.6 days that we obtained is most likely caused by the helical motion of the jet.
Chen Luo-En
Dai* Hongjie
Lei B. Y.
Li Hua-Zhong
Ren Ji-Yang
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