2021RAA....21..211C -
Research in Astron. and astroph., 21, 211 (2021/August-0)
Statistical properties of fast radio bursts elucidate their origins: magnetars are favored over gamma-ray bursts.
CUI X.-H., ZHANG C.-M., WANG S.-Q., ZHANG J.-W., LI D., PENG B., ZHU W.-W., STROM R., WANG N., WU Q., YE C.-Q., WANG D.-H., YANG Y.-Y. and DIAO Z.-Q.
Abstract (from CDS):
Fast radio bursts (FRBs) are extremely strong radio flares lasting several milliseconds, most of which come from unidentified objects at a cosmological distance. They can be apparently repeating or not. In this paper, we analyzed 18 repeaters and 12 non-repeating FRBs observed in the frequency bands of 400-800 MHz from Canadian Hydrogen Intensity Mapping Experiment (CHIME). We investigated the distributions of FRB isotropic-equivalent radio luminosity, considering the K correction. Statistically, the luminosity distribution can be better fitted by Gaussian form than by power-law. Based on the above results, together with the observed FRB event rate, pulse duration, and radio luminosity, FRB origin models are evaluated and constrained such that the gamma-ray bursts (GRBs) may be excluded for the non-repeaters while magnetars or neutron stars (NSs) emitting the supergiant pulses are preferred for the repeaters. We also found the necessity of a small FRB emission beaming solid angle (about 0.1 sr) from magnetars that should be considered, and/or the FRB association with soft gamma-ray repeaters (SGRs) may lie at a low probability of about 10%. Finally, we discussed the uncertainty of FRB luminosity caused by the estimation of the distance that is inferred by the simple relation between the redshift and dispersion measure (DM).
Abstract Copyright:
©
Journal keyword(s):
transients: fast radio bursts - methods: statistical - stars: magnetars
Simbad objects:
33
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