论文标题
等离子体镜头FRB的多个图像
The Multiple Images of the Plasma Lensing FRB
论文作者
论文摘要
我们研究了多个图像的形成，因为来自快速无线电突发（FRB）的无线电信号穿过等离子团的平面。采用了等离子体团块的指数模型来分析多个图像的属性。通过与经典分散关系进行比较，我们发现一个图像表现出对其他图像的特定逆性质，例如由于等离子体团的透镜效应，高频下的延迟时间高于低频的延迟时间。我们证明在某些重复的FRB中应观察到这些反作用。我们的结果预测了跨多个图像的估计DM偏差，这与FRB 121102和FRB 180916.J0158+65的观察结果一致。如果其他等离子体透镜具有类似于指数镜头的效果，我们发现它们还应引起多个图像中类似的分散关系。对于某些重复的FRB，分析在不同频率下的多个图像之间的时间延迟和DM的差异可以作为揭示血浆分布的方法。
We investigate the formation of multiple images as the radio signals from fast radio bursts (FRBs) pass through the plane of a plasma clump. The exponential model for the plasma clump is adopted to analyze the properties of the multiple images. By comparing with the classical dispersion relations, we find that one image has exhibited specific inverse properties to others, such as their delay times at high frequency is higher than that at low frequency, owing to the lensing effects of the plasma clump. We demonstrate that these inverse effects should be observable in some repeating FRBs. Our results predict deviation in the estimated DM across multiple images, consistent with the observations of FRB 121102 and FRB 180916.J0158+65. If other plasma lenses have effects similar to an exponential lens, we find that they should also give rise to the similar dispersion relation in the multiple images. For some repeating FRBs, analysis of the differences in time delay and in DM between multiple images at different frequencies can serve as a method to reveal the plasma distribution.
