论文标题
Blazar S5 0716+714的伽马射线排放中的31.3天瞬态式旋转振荡
A 31.3 day Transient Quasiperiodic Oscillation in Gamma-ray Emission from Blazar S5 0716+714
论文作者
论文摘要
我们系统地搜索了费米大面积望远镜光曲线库存储库中1525个来源的月份时间尺度上的准旋转振荡（QPO）信号。我们发现，在TEV Blazar S5 0716+714的伽马射线频带光曲线中，瞬态QPO为31.3 $ \ pm $ 1.8天，该曲线首次通过加权小波Z-Transform和Lobomb-Scargle时期方法在首次使用七个周期（MJD 55918-56137）。基于功率频谱密度和概率分布函数的蒙特卡洛模拟用于评估QPO的置信度，结果为$ \ sim4.1σ$。光曲线的季节性自回归整合运动平均建模表明，这是一个重要的物理QPO。讨论了解释Blazar月度QPO的零星QPO的物理模型。我们的研究表明，螺旋喷气模型和斑点在弯曲的喷气模型中旋转，以正确解释这种瞬态QPO。
We systematically search for quasiperiodic oscillatory (QPO) signals on the month timescale among the 1525 sources given in the Fermi Large Area Telescope Light Curve Repository. We find a transient QPO of 31.3$\pm$1.8 days in the gamma-ray band light curve of the TeV blazar S5 0716+714, which has seven cycles (MJD 55918-56137) for the first time by weighted wavelet Z-transform and Lomb-Scargle periodogram methods. Monte Carlo simulations based on the power spectral density and probability distribution function were used to evaluate the confidence level of the QPO, and the result is $\sim 4.1σ$. Seasonal autoregressive integrated moving average modeling of the light curve revealed it is a significant physical QPO. The physical models to explain the sporadic QPO of the month-timescale QPOs in blazar were discussed. Our studies indicate that the helical jet model and blob move helically in a curved jet model to properly explain this kind of transient QPO.
