物理学报Issue(13)：1-10,10.DOI:10.7498/aps.64.139801
蝎虎天体OJ287中等时标光变的周期特性研究∗
A study of the middle time-scale p erio dic b ehavior of light curve of BL Lac ob ject OJ287
摘要
Abstract
In this paper, we collect the 37 years’ data observed for BL Lac object OJ287 in the optical band, and construct its light curve from 1972 to 2009. Using the method of Lomb-Scargle Fourier transform, we analyze the middle time-scale periodic behavior and discover the primary periodic compositions of 52.0 ± 1.1 day and 255 ± 23 day. Then, we simulate the quasi-periodic signal of period doubling bifurcations and compare it with the observation data at different time-interval in their phase diagram and correlation dimension. Result indicates that OJ287 has multi-period scale features. At different time-intervals, there are different harmonic period components in the quasi-periodic light curve. Variation of harmonic period component is related with the disturbance of accretion flow which is from the secondary black hole to the primary black hole, and the periodicity variability may bifurcate the harmonic period component when the primary accretion flow is influenced by a strong disturbance.关键词
OJ287/光变周期/吸积流/倍周期分岔Key words
OJ287/period of light variation/accretion flows/period doubling bifurcation引用本文复制引用
丁楠,张皓晶,张雄,欧建文,罗丹..蝎虎天体OJ287中等时标光变的周期特性研究∗[J].物理学报,2015,(13):1-10,10.基金项目
国家自然科学基金重点项目(批准号：U1231203)、国家自然科学基金(批准号:11163007)、云南省自然科学基金(批准号:2012FB140)、云南省教育厅科学基金重点项目和云南省高校高能天体物理重点实验室项目资助的课题.* Project supported by the Key Program of the National Natural Science Foundation of China (Grant No. U1231203), the National Natural Science Foundation of China (Grant No.11163007), the Natural Science Foundation of Yunnan Province, China (Grant No.2012FB140), the Key Program of Science Foundation of Education Department of Yunnan Province, and the Key Program of Key Laboratory of the High Energy Astrophysics of University of Yunnan Province of China （批准号：U1231203）
