摘要
From the Owens Valley Radio Observatory 40 m radio telescope,we have collected the light curves of the 15 GHz radio band for FSRQ J0153-1153,spanning from 2009 February to 2018 February.The Lomb-Scargle Periodogram method and the Weighted Wavelet Z-transform method are employed to search for the quasi-periodic oscillation(QPO)signal of these data,and the simulation method for the light curve is utilized to estimate the significance level of this QPO signal;thus through these techniques,the QPO signal of 3.7±0.5 yr with a significance level of 3.68σis revealed for the first time.It is most likely an explanation for the QPO signal that a binary black hole system gives rise to a Newtonian-driven the precession of jet.Based on this assumption,we find that the mass of the secondary black hole in this system may be larger than the mass of the primary black hole;and we estimate the intrinsic QPO of jet precession and the QPO of companion star orbit.
基金
supported by private funding from the California Institute of Technology and the Max Planck Institute for Radio Astronomy
by NASA grants NNX08AW31G,NNX11A043G,and NNX14AQ89G and NSF grants AST0808050 and AST-1109911
partially supported by the regional first-class discipline of Guizhou province(QJKYF[2018]216)
major research projects for innovation groups in Guizhou province(Grant No.KY[2018]028)
Electronic Manufacturing Industry-University-Research Base of Ordinary Colleges and Universities in Guizhou Province(Qianjiaohe KY Zi[2014]No.230-3,Youth Foundation of the Education Department of Guizhou Province(No.KY[2017]248)
Guizhou Science and Technology Department(QKHJC[2019]1323)
Talent base for R&D of new optoelectronic materials and electronic devices。
