Coherent Electromagnetic Emission from Relativistic Magnetized Shocks
Coherent Electromagnetic Emission from Relativistic Magnetized Shocks
复制标题
相对论磁化冲击的相干电磁发射
DOI：
10.1103/physrevlett.127.035101
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发表时间：
2021
影响因子：
8.6
通讯作者：
Beloborodov, Andrei M.
中科院分区：
文献类型：
--
作者：
Sironi, Lorenzo;Plotnikov, Illya;Nättilä, Joonas;Beloborodov, Andrei M.
相对论磁化激波是相干辐射的天然来源，为快速射电暴（FRB）提供了一种合理的辐射机制。我们提出了第一性原理的三维模拟，提供了必要的信息FRB模型的基础上冲击：发射效率，频谱和偏振。模拟激波在磁化非等离子体中的传播。测得的激波能量转化为相干辐射的分数为，波谱的载能波数为，其中为上游回旋频率。由激波发射的模能流和模能流之比为。模的优势尤其强，在光谱带附近接近100%。我们还提供了一个详细的描述的发射机制为bothandmodes.
Relativistic magnetized shocks are a natural source of coherent emission, offering a plausible radiative mechanism for fast radio bursts (FRBs). We present first-principles 3D simulations that provide essential information for the FRB models based on shocks: the emission efficiency, spectrum, and polarization. The simulated shock propagates in anplasma with magnetization. The measured fraction of shock energy converted to coherent radiation is, and the energy-carrying wave number of the wave spectrum is, whereis the upstream gyrofrequency. The ratio of the-mode and-mode energy fluxes emitted by the shock is. The dominance of themode atis particularly strong, approaching 100% in the spectral band around. We also provide a detailed description of the emission mechanism for bothandmodes.