Are persistent emission luminosity and rotation measure of fast radio bursts related?

Understand

The physical origin of fast radio bursts (FRBs) is still unknown.

• Multiwavelength and polarization observations of an FRB source would be helpful to diagnose its progenitor and environment.
• So far only the first repeating source FRB 121102 appears to be spatially coincident with a persistent radio emission.
• Its bursts also have very large values of the Faraday rotation measure (RM) i.e., $|{\rm RM}|\sim10^5~{\rm rad~m^{-2}}$.