低峰频与高峰频blazar天体光变的对比研究

Blazar天体是天文学家研究喷流、如何从中心超大质量黑洞提取能源的重要研究对象，光变是研究blazar天体的一种重要手段。本项目将选择一批包含高峰频blazar天体(HBLs)和低峰频blazar天体(LBLs)的研究样本，制定科学合理的观测策略，通过观测和搜集历史观测数据相结合的方式获取大量的光学观测数据，采用多种统计检验和周期分析的方法对光变曲线进行研究分析，对比研究HBLs和LBLs光变的占空比，通过分析得到的光变周期和光变时标估算blazar天体的中心黑洞质量，并对HBLs和LBLs的中心黑洞质量进行统计研究。仔细研究光变过程中同步峰值频率与峰值流量的相关性，应用相关分析的结果和其它各方面的光变信息来研究引起blazar天体光变的物理原因和物理机制。

Blazars are important objects to research the jet and the mechanism of energy extraction from the central supermassive black hole for astronomer. Variability is an important tool to understand blazar well. One sample including high-frequency-peaked blazars (HBLs) and low-frequency-peaked blazars (LBLs) will be chosen, and scientific and reasonable observation strategy will be established in this project. Plenty of optical data will be obtained by our own observations and collecting from the literatures. We will analyze the light curves by all kinds of statistic test methods and period analysis algorithms. The central black hole mass could be estimated by variability period or variability time scale. The duty cycle of variability and the central black hole mass will be researched statistically for HBLs and LBLs. We will make an intensive study on the correlation between the synchrotron peak frequency and corresponding peak flux. The physical causes and the mechanism of variability will be researched based on the correlation results and other available informations of variability study.