Linearly-polarized Coherent Emission from Relativistic Magnetized Ion-electron Shocks

Autor:	Iwamoto, Masanori, Matsumoto, Yosuke, Amano, Takanobu, Matsukiyo, Shuichi, Hoshino, Masahiro
Rok vydání:	2023
Předmět:	Astrophysics - High Energy Astrophysical Phenomena Physics - Plasma Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.132.035201
Popis:	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. The kinetic energy conversion to the emission is so efficient that the wave amplitude is responsible for the brightness. We also find a polarization angle swing reflecting shock front modulation, implicating the polarization property of some repeating FRBs. The results support the shock scenario as an origin of the FRBs. Comment: accepted to PRL
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2311.18487 Zobrazit plný text záznamu View this record from Arxiv