Constraining FRB progenitors from flux distribution

Abstract

We present a generic formalism to constrain the cosmic rate density history and the source luminosity function of FRB progenitors from the statistical properties of the apparent flux density of non-repeating FRBs detected with Parkes. We include the pulse multipath propagation effects to evaluate the flux density distribution for a generalised spatial density model and luminosity function. We perform simulations to investigate the effects of the telescope beam pattern and temporal resolution on the observed flux density. We find that the FRB progenitors are likely to be younger stars with a relatively flat energy spectrum and host galaxy DM contribution similar to the MW. Our analysis can be extended to larger FRB samples detected with multiple surveys to place stronger constraints on the FRB progenitor properties.