High-energy counterpart for fast radio bursts

Abstract

The fast radio bursts (FRB) are a type of radio bursts with a high dispersion and short time scale. Most of them are known to be located in the high galactic latitude area and the light curve is known to be a simple single pulse structure. The total energy released by FRB is approximately 1038–1040 erg in the duration of approximately several milliseconds; and the rate of FRB is about approximately 103–104 Gpc−3 yr−1, which is much higher than that of GRB under the same condition. At present, >100 FRB events have been published, and theoretical models have been constructed to explain such phenomena, such as the combination of double compact stars, the collapse of compact stars, the collision and interaction between neutron stars and small celestial bodies, the giant flare of magnetic stars and the giant pulse of the pulsars. However, it is difficult to distinguish between these models based on a single radio band, and the multi-band radiation of FRB is likely to effectively distinguish or restrict this model and its mechanism; hence, multi-band detection is very important for the research of FRB. In this paper, the main theoretical models of FRB are summarized and organized in detail, and the situation of high-energy electromagnetic radiation in these theories has been emphatically analyzed. In addition, the GECAM satellite under construction in China will be expected to actualize the monitoring of gamma-ray in the whole sky, full time and wide energy range, and its future detection results will be expected to screen and verify these theoretical models.