费米耀变体的射电波段周期性光变研究  

Quasi-periodic Variations in the Radio Light Curves of Fermi Blazars

作　　者：文一 肖宇婷 李孝攀 杨海燕 Wen Yi;Xiao Yuting;Li Xiaopan;Yang Haiyan(School of Physics and Information Engineering,Zhaotong University,Zhaotong 657000,China)

机构地区：[1]昭通学院物理与信息工程学院,云南昭通657000

出　　处：《天文研究与技术》2023年第2期95-102,共8页Astronomical Research & Technology

基　　金：国家自然科学基金(11903028)资助.

摘　　要：运用REDFIT方法对4个费米耀变体的MOJAVE(Monitoring Of Jets in Active Galactic Nuclei with VLBA Experiments)15.3 GHz观测数据进行了周期分析,发现0851+202存在1.77年的周期成分,1308+326存在8.69年的周期成分,1641+399存在2.04年的周期成分,2251+158存在7.65年的周期成分,且这些周期成分的置信度均大于99%。运用超大质量双黑洞模型和螺旋喷流模型对这些周期成分进行了解释,并估算这4个耀变体的中心黑洞质量为10^(9) M_(⊙)~10^(10) M_(⊙)。We search for possible periodicity in the MOJAVE(Monitoring Of Jets in Active Galactic Nuclei with VLBA Experiments)observations at 15.3 GHz of eight Fermi blazars using the REDFIT method.Possible periodic components of about 1.77,8.69,2.04 and 7.65 years are found in the sources 0851+202,1308+326,1641+399 and 2251+158 at a 99%confidence level,respectively.The super-massive binary black hole model and the helical jet model are used to explain these periodicities.And they are also used to caculate the central black hole masses of the four sources which are 10^(9) M_(⊙)~10^(10) M_(⊙).

关 键 词：耀变体 REDFIT方法 光变周期 中心黑洞质量 

分 类 号：P157.7[天文地球—天文学]