Energy functions of fast radio bursts derived from the first CHIME/FRB catalogue

Tetsuya, Hashimoto and Goto, Tomotsugu and Chen, Bo Han and Ho, Simon C. C. and Hsiao, Tiger Y. Y. and Wong, Yi Hang Valerie and On, Alvina Y. L. and Kim, Seong Jin and Kilerci, Ece and Huang, Kai-Chun and Santos, Daryl Joe D. and Yamasaki, Shotaro (2022) Energy functions of fast radio bursts derived from the first CHIME/FRB catalogue. Monthly Notices of the Royal Astronomical Society, 511 (2). pp. 1961-1976. ISSN 0035-8711 (Print) 1365-2966 (Online)

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Fast radio bursts (FRBs) are mysterious millisecond pulses in radio, most of which originate from distant galaxies. Revealing the origin of FRBs is becoming central in astronomy. The redshift evolution of the FRB energy function, i.e. the number density of FRB sources as a function of energy, provides important implications for the FRB progenitors. Here, we show the energy functions of FRBs selected from the recently released Canadian Hydrogen Intensity Mapping Experiment (CHIME) catalogue using the Vmax method. The Vmax method allows us to measure the redshift evolution of the energy functions as it is without any prior assumption on the evolution. We use a homogeneous sample of 164 non-repeating FRB sources, which are about one order of magnitude larger than previously investigated samples. The energy functions of non-repeating FRBs show Schechter function-like shapes at z ≲ 1. The energy functions and volumetric rates of non-repeating FRBs decrease towards higher redshifts similar to the cosmic stellar-mass density evolution: There is no significant difference between the non-repeating FRB rate and cosmic stellar-mass density evolution with a 1 per cent significance threshold, whereas the cosmic star-formation rate scenario is rejected with a more than 99 per cent confidence level. Our results indicate that the event rate of non-repeating FRBs is likely controlled by old populations rather than young populations that are traced by the cosmic star-formation rate density. This suggests old populations, such as old neutron stars and black holes, as more likely progenitors of non-repeating FRBs. © 2022 The Author(s).
Item Type: Article
Uncontrolled Keywords: (transients:) fast radio bursts; Radio continuum: Transients; Stars: Luminosity function, mass function; Stars: Magnetars; Stars: Magnetic field; Stars: neutron
Subjects: Q Science > QB Astronomy > QB460-466 Astrophysics
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Physics
Faculty of Engineering and Natural Sciences
Depositing User: Ece Kilerci
Date Deposited: 06 Jul 2022 14:55
Last Modified: 25 Aug 2022 09:01

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