Persistent Radio Emission from Synchrotron Heating by a Repeating Fast Radio Burst Source in a Nebula

Understand

The first repeating fast radio burst (FRB), FRB 121102, was found to be associated with a spatially coincident, persistent nonthermal radio source, but the origin of the persistent emission remains unknown.

• In this paper, we propose that the persistent emission is produced via synchrotron-heating process by multiple bursts of FRB 121102 in a self-absorbed synchrotron nebula.
• As a population of bursts of the repeating FRB absorbed by the synchrotron nebula, the energy distribution of electrons in the nebula will change significantly.
• As a result, the spectrum of the nebula will show a hump steadily.