Black hole merger rates in the first billion years in light of JWST data

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Table 2.

Best-fit free parameters for the fiducial model.

Parameter	Best-fitting values	Description
$f_{acc}^{bh}$ $Mathematical equation: $ f_{\mathrm{acc}}^{\mathrm{bh}} $$ ^a	0.1 (5×10⁻³)^b	Fraction of gas accreted by the BH after SNII feedback.
f_Edd ^a	1.0 (10⁻³)^b	Eddington fraction accreted by the BH.
f_w^bh	5×10⁻⁴	Fraction of BH feedback coupled to winds.
f_w^⋆	0.04	Fraction of SNII feedback coupled to winds

Notes. A detailed explanation on how we found these values can be found in Appendix B.

^(a)

These parameters are implemented with a 0.5 dex scatter.

^(b)

Values in parenthesis correspond to the case when the halo lies below the critical threshold M_h^crit = 10^11.25[Ω_m(1 + z)³ + Ω_Λ]^−0.125 M_⊙, which also has a 0.5 dex scatter.

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