Modelling repetition in zDM: a single population of repeating fast radio bursts can explain CHIME data

Understand

Regardless of whether or not all fast radio bursts (FRBs) repeat, those that do form a population with a distribution of rates.

• This work considers a power-law model of this population, with rate distribution $\Phi_r \sim R^{\gamma_r}$ between $R_{\rm min}$ and $R_{\rm max}$.
• The zDM code is used to model the probability of detecting this population as either apparently once-off or repeat events as a function of redshift, $z$, and dispersion measure, DM.
• I demonstrate that in the nearby Universe, repeating sources can contribute significantly to the total burst rate.