Plasma Radiation Model of Fast Radio Bursts from Magnetars

Abstract

We propose a novel idea for the coherent intense millisecond radio emission of cosmic fast radio bursts (FRBs), which have recently been identified with flares from a magnetar. Motivated by the conventional paradigm of Type III solar radio bursts, we will explore the emission of coherent plasma line radiation at the electron plasma frequency and its harmonic as potential candidates of the coherent FRB emissions associated with magnetar flares. We discuss the emissions region parameters in relativistic strongly magnetized plasmas consisting of electrons, positrons and protons. The goal is to make observable predictions of this model to confront the multi-wavelength observations of FRBs from magnetars. These results will impact both observational radio astronomy and space-based astrophysics