The Cosmic Evolution of Fast Radio Bursts Inferred from the CHIME/FRB Baseband Catalog 1
Om Gupta, Paz Beniamini, Pawan Kumar, Steven L. Finkelstein

TL;DR
This paper calibrates the joint fluence-DM distribution of FRBs using CHIME/FRB data, revealing their energy distribution and potential formation channels, and predicts future detection rates at high redshifts to study cosmic reionization.
Contribution
First calibration of the 2D fluence-DM distribution for FRBs using CHIME/FRB baseband data, providing insights into their energy distribution and cosmic evolution.
Findings
FRB energy distribution follows a Schechter function with slope -1.94.
A combination of young and old formation channels is likely for FRBs.
Predicted detection rates of high-redshift FRBs for future radio surveys.
Abstract
Redshift and luminosity distributions are essential for understanding the cosmic evolution of extragalactic objects and phenomena, such as galaxies, gamma-ray bursts, and fast radio bursts (FRBs). For FRBs, these distributions are primarily estimated using the fluence and the Dispersion Measure (DM). Calibrating their joint distribution has been challenging due to a lack of accurate fluences in the intensity data of the CHIME/FRB survey. Using the baseband update of CHIME/FRB Catalog 1, we calibrate the 2D fluence-DM distribution for the first time. We find the energy distribution is described well by a Schechter function with power-law slope of . Testing two types of redshift evolution models suggests a likely combination of young and old formation channels. % of FRB sources may track star formation, or correspondingly, FRB sources may have delay…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Astrophysics and Star Formation Studies · Gamma-ray bursts and supernovae
