论文标题
重复快速无线电爆发20201124a起源于磁铁/be star二进制
Repeating fast radio burst 20201124A originates from a magnetar/Be star binary
论文作者
论文摘要
快速无线电爆发（FRB）是宇宙来源发射毫秒的无线电爆发。尽管已经发现了数百个FRB，但它们的物理性质和中央发动机尚不清楚。由于当地环境，法拉第旋转措施和分散度量的变化是理解其身体本质的关键线索。关于FRB 20201124a旋转度量的最新观察结果显示，每天时间尺度有显着变化。有趣的是，旋转度量的振荡支持局部贡献可以改变符号，这表明磁场沿视线沿线逆转。在这里，我们提出了一个物理模型，该模型解释了FRB 20201124a的特征，并提出重复信号来自二进制系统，该系统包含磁性和带有法定磁盘的恒星。当磁力接近periastron时，无线电波通过BE恒星的磁盘的传播自然会导致观察到的不同的旋转度量，去极化，大散射时间尺度和法拉第转换。这项研究将促使搜索来自/X射线二进制文件的FRB信号。
Fast radio bursts (FRBs) are cosmic sources emitting millisecond-duration radio bursts. Although several hundreds FRBs have been discovered, their physical nature and central engine remain unclear. The variations of Faraday rotation measure and dispersion measure, due to local environment, are crucial clues to understanding their physical nature. The recent observations on the rotation measure of FRB 20201124A show a significant variation on a day time scale. Intriguingly, the oscillation of rotation measure supports that the local contribution can change sign, which indicates the magnetic field reversal along the line of sight. Here we present a physical model that explains observed characteristics of FRB 20201124A and proposes that repeating signal comes from a binary system containing a magnetar and a Be star with a decretion disk. When the magnetar approaches the periastron, the propagation of radio waves through the disk of the Be star naturally leads to the observed varying rotation measure, depolarization, large scattering timescale, and Faraday conversion. This study will prompt to search for FRB signals from Be/X-ray binaries.
