论文标题
Fermi大面积望远镜的浆液驱动的$γ$ ray耀斑的可观察性
The observability of plasmoid-powered $γ$-ray flares with the Fermi Large Area Telescope
论文作者
论文摘要
在Blazars中生产快速$γ$ ray变异性的确切机制仍在争论中。磁重新连接形成了充满相对论颗粒和磁场的浆液，是解释这些物体的宽带电磁频谱和可变性的可行候选者。使用最新的磁重新连接模拟，我们生成了逼真的$γ$ - 射线光曲线，而费米大面积望远镜将观察到。与观察到的$γ$ - 射线的比较，来自扁平光谱无线电类星体（FSRQ）表明，磁重新连接事件会导致可比的通量水平和可变性模式，尤其是当重新连接层与视线略微失误时。从快速移动的近距离线移动的快速浆液的发射可以解释在FSRQ观察结果中发现证据的时间尺度上的快速变化。我们的结果激发了现有的辐射转移模拟的改善以及对快速变异性的专用搜索，作为磁重新连接事件的证据。
The exact mechanism for the production of fast $γ$-ray variability in blazars remains debated. Magnetic reconnection, in which plasmoids filled with relativistic particles and magnetic fields are formed, is a viable candidate to explain the broadband electromagnetic spectrum and variability of these objects. Using state-of-the-art magnetic reconnection simulations, we generate realistic $γ$-ray light curves that would be observed with the Fermi Large Area Telescope. A comparison with observed $γ$-ray flares from flat spectrum radio quasars (FSRQs) reveals that magnetic reconnection events lead to comparable flux levels and variability patterns, in particular when the reconnection layer is slightly misaligned with the line of sight. Emission from fast plasmoids moving close to the line of sight could explain fast variability on the time scales of minutes for which evidence has been found in observations of FSRQs. Our results motivate improvements in existing radiative transfer simulations as well as dedicated searches for fast variability as evidence for magnetic reconnection events.
