平谱射电类星体3C 454.3的中长周期光变特性研究  

The Medium and Long Period Light Variation Characteristics of FSRQ 3C 454.3

作　　者：吴月承 张皓晶[1] 余莲 徐小林 Wu Yuecheng;Zhang Haojing;Yu Lian;Xu Xiaolin(College of Physics and Electronics,Yunnan Normal University,Kunming 650500,China)

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650500

出　　处：《天文研究与技术》2020年第1期1-7,共7页Astronomical Research & Technology

基　　金：国家自然科学基金(11063004);云南省中青年学术和技术带头人后备人才(2017HB020)资助.

摘　　要：耀变体具有明显的、剧烈的大幅度光变,中长时标的光变研究对于揭示耀变体的光变特征和光变机理有重要作用。通过选取平谱射电类星体3C 454.3的光学B,V,R和红外J,K波段2008年6月~2017年7月的原始光变数据,采用功率谱方法研究3C 454.3的中长周期光变特性,得出光变主周期为1.25年,4.57年的周期为1.25年周期的叠加。3C 454.3在光学、红外以及射电波段的光变有一定的关系。研究显示,3C 454.3的红外光度比光学波段更为明亮,红外光变比光学波段更为剧烈。Blazars have obvious and intense large-scale light variations.The study of light variations on medium and long time scales plays an important role in revealing the characteristics and mechanism of light variations of Blazars.By selecting the original optical B,V,R and infrared J,K bands of the flat-spectrum radio quasar 3C 454.3 from June 2008 to July 2017,the medium and long period characteristics of 3C 454.3 are studied by power spectrum method.It is concluded that the main period of light variation is 1.25 years,and the period of 4.57 years is the superposition of 1.25 years.3C 454.3 is related to the optical,infrared and radio variations.The results show that the infrared luminosity of 3C 454.3 is brighter than that of optical band,and the infrared light variation is more intense than that of optical band.

关 键 词：平谱射电类星体 3C 454.3 长周期光变 功率谱方法 

分 类 号：P157[天文地球—天文学]