Abstract Observations of PKS 1510-089 indicate the existence of a deep flux minimum with a timescale of $\sim$35 min and an interval of about 336±14 d. A binary black hole system is proposed to be at the nucleus of this object. The secondary black hole orbits around the primary black hole. The minimum is caused by the periodic eclipse of the primary black hole by the secondary black hole. Based on the observations of PKS 1510-089, we estimate the parameters of the binary black hole system. The masses for the primary and secondary black holes are 1. 37×109$M_{\odot}$ ($M_{\odot}$ is the solar mass) and 1. 37 $\times $107$M_{\odot}$, and the major axis for this pair being about 0.1 parsec(pc).
Received: 06 December 2005
Revised: 18 September 2006
Accepted manuscript online:
Fund: Project supported by State
Key Development Program for Basic
Research of China (Grant No 19990754), the National Science
Foundation for Outstanding Young Scientists of China (Grant No 10125313),
the National Natural Science Foundation of China (Grant No
10573005), and the Fund for Top Scholars of Guangdong Province, China
(Grant No 02114).
Cite this article:
Li Juan(李娟) Fan Jun-Hui(樊军辉), and Yuan Yu-Hai(袁聿海) The parameters of binary black hole system in PKS 1510-089 2007 Chinese Physics 16 876
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