Evidence of Quasi-periodic Oscillation in the Optical Band of the Blazar 1ES 1959+650
Evidence of Quasi-periodic Oscillation in the Optical Band of the Blazar 1ES 1959+650
复制标题
耀变体光带中准周期振荡的证据 1ES 1959 650
DOI：
10.1088/1674-4527/ac71fc
复制
发表时间：
2022-11-01
影响因子：
1.8
通讯作者：
Yi, Ting-Feng
中科院分区：
文献类型：
--
作者：
Dong, Fu-Tong;Gai, Ning;Yi, Ting-Feng
我们分析了TeV blazar 1959+650从2002年到2018年的R波段光学监测数据，并提供了该物体准周期振荡的证据。光变曲线显示出类似于540天的稳定和持久的周期性，通过Lomb-Scargle周期图、Jurkevich和加权小波z变换技术检测到。使用PSRESP方法估计红噪声功率谱，并且发现该周期处于>3 sigma显著性水平。还有两个可能的周期在类似268和类似1100天检测到的所有三种方法。然而，它们的显著性水平相对较低，因此这两个时期无法通过现有数据进行验证。我们讨论了几种可能的物理模型，可以解释这个对象的周期性变化。
We analyzed the optical monitoring data in the R band of TeV blazar 1ES 1959+650 from 2002 to 2018, and provided evidence of a quasi-periodic oscillation in this object. The light curve shows a stable and persistent periodicity at similar to 540 days, detected by the Lomb-Scargle periodogram, Jurkevich and weighted wavelet z-transform techniques. The red noise power spectrum was estimated using the PSRESP method, and this period was found to be at >3 sigma significance level. There are also two possible periodicities at similar to 268 and similar to 1100 days detected by all three methods. However, their significance levels are relatively low, and thus these two periods cannot be verified by the present data. We discuss several possible physical models that could explain the periodic variability in this object.