论文标题
搜索$γ$ ray活性银核中的准周期调制
Searching for Quasi-Periodic Modulations in $γ$-ray Active Galactic Nuclei
论文作者
论文摘要
我们在第三\ emph {fermi}大面积望远镜源目录（3FGL）中对$γ$ ray活性银河核（AGN）进行准周期变化的系统搜索。我们采用两种技术，即Lomb-Scargle周期图（LSP）和加权小波Z-Transform（WWZ），以获取2008年8月至2016年12月覆盖的$γ$ ray光曲线的功率光谱。结果表明，除了以前的工作中已经报告的几个对象外，另一个来源，FSRQ PKS 0601-70在其$γ$ ray-ray光曲线中可能具有450天的准周期可变性，其重要性为$>3σ$。讨论了我们发现的物理含义。
We perform a systematic search of quasi-periodic variabilities in $γ$-ray active galactic nuclei (AGNs) in the third \emph{Fermi} Large Area Telescope source catalog (3FGL). We employe two techniques, Lomb-Scargle Periodogram (LSP) and Weighted Wavelet Z-transform (WWZ), to obtain power spectra of $γ$-ray light curves covering from 2008 August to 2016 December. The results show that besides several objects that have been reported in previous works, an additional source, the FSRQ PKS 0601-70 has a possible quasi-periodic variability of 450 days in its $γ$-ray light curves with the significance of $>3σ$. The physical implications of our findings are discussed.
