论文标题
磁场在湍流环境中的磁场逆转围绕重复的快速无线电爆发
Magnetic field reversal in the turbulent environment around a repeating fast radio burst
论文作者
论文摘要
快速无线电爆发（FRB）是来自身份不明的外层次来源的简短，强烈的无线电波闪烁。极化FRB源自高度磁化的环境。我们报告了跨越17个月的重复FRB 20190520b的观察结果，该观察表明，它的Faraday旋转量很大，并且两倍更改其符号。 FRB还将在1至3 GHz左右的无线电频率下面去极化。我们将这些属性解释为沿视线（包括逆转）的集成磁场的平行分量的变化。这可能是由于传播通过湍流的，磁化的等离子体屏幕，位于$ 10^{-5} $之间，到FRB源的100 parsecs。这与经过FRB源二进制伴侣的恒星风的爆发是一致的。
Fast radio bursts (FRBs) are brief, intense flashes of radio waves from unidentified extragalactic sources. Polarized FRBs originate in highly magnetized environments. We report observations of the repeating FRB 20190520B spanning seventeen months , which show its amount of Faraday rotation is highly variable and twice changes its sign. The FRB also depolarizes below radio frequencies around 1 to 3 GHz. We interpret these properties as due to change in the parallel component of the integrated magnetic field along the line-of-sight, including reversals. This could result from propagation through a turbulent, magnetized screen of plasma located between $10^{-5}$ to 100 parsecs of the FRB source. This is consistent with the bursts passing through the stellar wind of a binary companion of the FRB source.
