Birth and evolution of fast radio bursts: Strong population-based evidence for a neutron-star origin

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Volume 690 (October 2024)

A&A, 690 (2024) A377

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Table 1.

Summary of best-fitting values for different models in this work and GL21.

	Parameters

Models	α	li	log₁₀(w_int, mean/ms)	w_int, std	DM_IGM, slope	DM_host	DM_host, mean	DM_host, std
				ms	pc cm⁻³	pc cm⁻³	pc cm⁻³	pc cm⁻³
GL21	−2.2	−0.8	−2.44	0.6	1000	50	–	–
This work:
Power law density	$- 1 . 58_{- 0.27}^{+ 0.09}$ $-1.58_{-0.27}^{+0.09}$	$- 1 . 51_{- 0.28}^{+ 0.09}$ $-1.51_{-0.28}^{+0.09}$	$- 0 . 45_{- 0.30}^{+ 0.15}$ $-0.45_{-0.30}^{+0.15}$	$1 . 75_{- 0.26}^{+ 0.55}$ $1.75_{-0.26}^{+0.55}$	$780_{- 94}^{+ 349}$ $780_{-94}^{+349}$	–	$560_{- 190}^{+ 37}$ $560_{-190}^{+37}$	$610_{- 124}^{+ 176}$ $610_{-124}^{+176}$
SFR	–	$- 1 . 58_{- 0.18}^{+ 0.10}$ $-1.58_{-0.18}^{+0.10}$	$- 0 . 50_{- 0.19}^{+ 0.22}$ $-0.50_{-0.19}^{+0.22}$	$1 . 65_{- 0.28}^{+ 0.40}$ $1.65_{-0.28}^{+0.40}$	$840_{- 140}^{+ 303}$ $840_{-140}^{+303}$	–	$490_{- 129}^{+ 74}$ $490_{-129}^{+74}$	$520_{- 134}^{+ 209}$ $520_{-134}^{+209}$
Delayed SFR – 0.1 Gyr	–	$- 1 . 64_{- 0.23}^{+ 0.11}$ $-1.64_{-0.23}^{+0.11}$	$- 0 . 52_{- 0.28}^{+ 0.17}$ $-0.52_{-0.28}^{+0.17}$	$1 . 70_{- 0.27}^{+ 0.31}$ $1.70_{-0.27}^{+0.31}$	$790_{- 104}^{+ 353}$ $790_{-104}^{+353}$	–	$510_{- 103}^{+ 78}$ $510_{-103}^{+78}$	$540_{- 111}^{+ 189}$ $540_{-111}^{+189}$
Delayed SFR – 0.5 Gyr	–	$- 1 . 62_{- 0.25}^{+ 0.10}$ $-1.62_{-0.25}^{+0.10}$	$- 0 . 53_{- 0.27}^{+ 0.19}$ $-0.53_{-0.27}^{+0.19}$	$1 . 68_{- 0.25}^{+ 0.35}$ $1.68_{-0.25}^{+0.35}$	$800_{- 100}^{+ 352}$ $800_{-100}^{+352}$	–	$510_{- 115}^{+ 68}$ $510_{-115}^{+68}$	$550_{- 121}^{+ 178}$ $550_{-121}^{+178}$
Delayed SFR – 1 Gyr	–	$- 1 . 65_{- 0.22}^{+ 0.13}$ $-1.65_{-0.22}^{+0.13}$	$- 0 . 54_{- 0.28}^{+ 0.20}$ $-0.54_{-0.28}^{+0.20}$	$1 . 68_{- 0.31}^{+ 0.33}$ $1.68_{-0.31}^{+0.33}$	$840_{- 140}^{+ 303}$ $840_{-140}^{+303}$	–	$510_{- 111}^{+ 76}$ $510_{-111}^{+76}$	$560_{- 131}^{+ 169}$ $560_{-131}^{+169}$

Notes. The best-fitting values of the population parameters, plus and minus the 1σ uncertainty, from the MC simulation in GL21 and the MCMC simulations of the power-law density, SFR and three delayed SFR models in this work are presented. For formatting unity, insignificant digits are also included in certain values and errors.

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