摘要
从历史文献中搜集了OQ 530最完备的射电波段(4.8,8,14.5,22和37 GHz)和光学B波段的光变数据,利用三种不同的周期分析方法(结构函数法、J-K方法和功率谱法)对6个波段光变曲线的周期性进行了分析.利用离散相关函数法对射电波段之间以及射电与光学波段之间的相关性进行了分析.周期性的分析结果显示4.8 GHz可能存在3.89–3.94 a的周期,8 GHz可能存在2.48–2.55 a的周期,14.5 GHz可能存在2.44–2.56 a的周期,22 GHz可能存在2.34–2.56 a,4.16–4.30 a的周期,37 GHz可能存在2.31–2.58a的周期,光学B波段可能存在的0.97–1.15 a的周期.相关性分析显示OQ 530在5个射电波段之间存在较强相关,延迟方面无明显变化规律.光学与射电波段之间的相关性显示光学波段要超前于射电波段,且随频率的逐渐变小延迟有逐渐增大的变化趋势.
From the historical literatures, we collect the most complete data of light curves in radio band （4.8, 8, 14.5, 22 and 37 GHz） and optical B band, and analyze the period of light curve in six different bands by three different methods （structure function method, J-K method and power density spectrum method）, and analyze the correlation among radio bands and the correlation between optical B band and radio band by discrete correlation function method. The analytical results of periodicity suggest that 3.89-3.94 a is the possible period in 4.8 GHz, 2.48-2.55 a is the possible period in 8 GHz, 2.44-2.56 a is the possible period in 4.5 GHz, 2.34-2.56 a and 4.16-4.30 a is the possible period in 22 GHz, 2.31-2.58 a is the possible period in 37 GHz, 0.97-1.15 a is the possible period in optical B band. The analysis of correlation indicate that they are strong correlations among the five radio bands and no time delay obviously, optical band lead by the radio band between optical band and radio band. The time delay increase while the frequency reduce gradually.
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2015年第2期91-102,共12页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家自然科学基金(批准号:11273052)
河北省自然基金资助项目(批准号:A2015408006)资助项目
关键词
耀变体
光变
周期
相关性
blazar, variability, period, correlation
