Test invariance of the characteristic energy scale in FRB 20220912A

Determine whether the characteristic exponential energy scale E_0 in FRB 20220912A remains invariant across temporally resolved activity epochs, thereby testing whether the stable dissipation scale identified in FRB 20220529 also characterizes this hyperactive repeater.

Background

The paper identifies an exponential-plus-power-law energy distribution in FRB 20220529, with a characteristic low-energy scale E_0 that remains stable over 3.2 years despite a substantial decline in the global burst rate. This stability is interpreted as evidence for an intrinsic dissipation scale that is decoupled from the source’s overall trigger activity.

FRB 20220912A exhibits a phenomenologically similar transition from an exponential component to a power-law high-energy tail, and its burst distribution is also fit using the exponential-plus-power-law framework. However, the available comparison does not include an epoch-resolved test of whether its fitted E_0 is temporally stable. Establishing this would clarify whether invariant two-component energy-release hierarchies recur across hyperactive repeating FRBs.

References

Whether the characteristic scale $E_0$ is similarly invariant in FRB~20220912A remains an open question testable with epoch-resolved analysis.

— An invariant energy release hierarchy in a repeating fast radio burst  (2608.18455 - Yang et al., 19 Aug 2026) in Section “Comparison with other hyperactive repeaters”