Black hole–neutron star and binary neutron star mergers from Population III and II stars

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Table 7

Detectability-conditioned Bayes factors, ln D, for Pop. III models against the fiducial Pop. II model.

GW signals			ln D_{Pop.III/Pop.II}
Name	m_1,s (M_⊙)	m_2,s (M_⊙)	kro1	kro5	lar1	lar5	log1	log2	log3	log4	log5	top1	top5
GW190917	${9.7}_{- 3.9}^{+ 3.4}$ $9.7_{-3.9}^{+3.4}$	${2.1}_{- 0.4}^{+ 1.1}$ $2.1^{+1.1}_{-0.4}$	−1.1	−3.3	−0.4	−4.2	−1.7	−3.9	−1.3	−1.6	−4.2	−1.1	−83.2
GW191219	${31.1}_{- 2.8}^{+ 2.2}$ $31.1_{-2.8}^{+2.2}$	${1.17}_{- 0.06}^{+ 0.07}$ $1.17_{-0.06}^{+0.07}$	2.2	3.7	1.9	4.5	2.1	1	2.3	2.2	3.4	1.7	4.1
GW200105	${9.1}_{- 1.7}^{+ 1.7}$ $9.1_{-1.7}^{+1.7}$	${1.91}_{- 0.24}^{+ 0.33}$ $1.91_{-0.24}^{+0.33}$	−4.4	−11.2	−4.7	−9.9	−2.7	−16	−3.7	−3	−14.8	−3.3	−512.4

Notes. Detectability-conditioned Bayes factors, ln D, for Pop. III models, evaluated against the fiducial Pop. II model (kro1), for GW events classified as BHNS mergers or containing one component in the lower mass gap. The selected events were detected during the first three observing runs of LVK. Columns 1-3: event name and source-frame component masses. Columns 4-14: lnD values for each Pop. III model relative to the Pop. II reference model.

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