论文标题
大麻的光学和伽玛射线长期变化的研究
Study of optical and gamma-ray long-term variability in blazars
论文作者
论文摘要
Blazars是强大的活跃银河核的子集，具有相对论的喷射，它们在宽带电磁辐射中发光，e。 g。从无线电到TEV排放。在这里，我介绍了探索伽马射线样本的伽马射线和光学变异性能的研究结果，对十年的光学和费米/LAT观察进行了几种时间序列分析的方法。主要结果如下：发现源在两个频段中都高度可变，并且发现伽马射线功率频谱密度与闪烁噪声一致，表明工作中的长期内存过程。在比较两种发射时，不仅整体光学和$γ$ ray的发射都高度相关，而且两个观测分布都表现出较重的尾对数正态分布和线性RMS-flux关系。此外，在一些频段中，在某些准周期振荡的源指示下，具有相似的特征时间尺度。我们根据当前的Blazar模型讨论了结果，并具有相对论的冲击，在靠近视线的射流中传播了相对论的冲击。
Blazars, a subset of powerful active galactic nuclei, feature relativistic jets that shine in a broadband electromagnetic radiation, e. g. from radio to TeV emission. Here I present the results of the studies that explore gamma-ray and optical variability properties of a sample of gamma-ray bright sources Several methods of time-series analyses are performed on the decade-long optical and Fermi/LAT observations. The main results are as follows: The sources are found highly variable in both the bands, and the gamma-ray power spectral density is found to be consistent with flicker noise suggesting long-memory processes at work. While comparing two emission, not only the overall optical and the $γ$-ray emission are highly correlated but also both the observation distributions exhibit heavy tailed log-normal distribution and linear RMS-flux relation. In addition, in some of the sources indications of quasi-periodic oscillation were revealed with similar characteristic timescales in both the bands. We discuss the results in light of current blazar models with relativistic shocks propagating down the jet viewed close to the line of sight.
