Takanobu Amano

1 Introduction Weibel instability is a non-resonant plasma instability that converts the free energy of temperature anisotropy to magnetic field energy in unmagnetized or weakly magnetized plasmas. The original discovery dates back to the 1950s [1, 2], and the basic theory of this instability was developed in the following years [3, 4]. In the early 2000s, renewed scientific interest in the Weibel instability emerged, persisting to the present.

Fast radio bursts (FRBs) are millisecond transient astrophysical phenomena and bright at radio frequencies. The emission mechanism, however, remains unsolved yet. One scenario is a coherent emission associated with the magnetar flares and resulting relativistic shock waves. Here, we report unprecedentedly large-scale simulations of relativistic magnetized ion-electron shocks, showing that strongly linear-polarized electromagnetic waves are excited.