摘要
Fast Radio Bursts (FRBs)ãre classified into repeatersãnd non-repeaters, with onlyã few per cent of the observed FRB population from the Canadian Hydrogen Intensity Mapping Experiment (CHIME) confirmedãs repeaters. Ho we ver, this figure represents onlyã lower limit due to the observational biases,ãnd the true fraction of repeaters remains unknown. Correcting for these biases unco v ersã notable decline inãpparently non-repeating FRB detection rateãs the CHIME operational time increases. This finding suggests thatã significant portion ofãpparently non-repeating FRBs could in fact exhibit repetition when observed over more extended periods. A simple population model infers that the true repeater fraction likely exceeds 50 per cent with 99 per cent confidence,ã figure substantially larger than the observed face vãlue, e ven consistent with 100 per cent. This greater pre vãlence of repeaters had previously gone unnoticed due to their very low repetition rates ( ∼10 -3.5 h -1 onãverage). Hence, theoretical FRB models must incorporate these low-rate repeaters. Furthermore, our results indicateã significantly higher repeater volume number density, potentially exceeding observed values by up to 10 4 times, which in turn impacts comparisons with potential FRB progenitors.