Galaxy size and mass build-up in the first 2 Gyr of cosmic history from multi-wavelength JWST NIRCam imaging

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Table A.1.

Best-fit parameters to the size–mass equation for each redshift bin that we fit for.

Redshift	Parameter	F115W	F150W	F200W	F277W	F356W	F410M	F444W
	α	0.204	0.203	0.204	0.181	0.142	0.116	0.105
	σ_α	0.012	0.011	0.010	0.009	0.009	0.009	0.009
3 ≤ z < 4	log₁₀A	0.070	0.083	0.087	0.092	0.085	0.085	0.092
(z_median = 3.21)	σ_log₁₀A	0.006	0.005	0.005	0.004	0.004	0.004	0.004
	σ_{logR_EFF}	0.232	0.217	0.199	0.189	0.186	0.180	0.178
	α	0.213	0.220	0.218	0.231	0.200	0.159	0.151
	σ_α	0.015	0.014	0.013	0.012	0.012	0.012	0.012
4 ≤ z < 5	log₁₀A	-0.035	-0.031	-0.012	-0.012	-0.002	0.005	0.014
(z_median = 4.43)	σ_log₁₀A	0.007	0.007	0.006	0.005	0.005	0.006	0.006
	σ_{logR_EFF}	0.225	0.211	0.191	0.174	0.171	0.171	0.168
	α	0.303	0.294	0.288	0.259	0.231	0.170	0.173
	σ_α	0.033	0.031	0.030	0.028	0.028	0.029	0.029
5 ≤ z < 6	log₁₀A	-0.115	-0.109	-0.105	-0.082	-0.070	-0.023	-0.025
(z_median = 5.28)	σ_log₁₀A	0.015	0.014	0.013	0.012	0.013	0.013	0.013
	σ_{logR_EFF}	0.227	0.214	0.210	0.197	0.193	0.188	0.191
	α	0.215	0.215	0.215	0.215	0.215	0.215	0.215
	σ_α	–	–	–	–	–	–	–
6 ≤ z < 9	log₁₀A	-0.176	-0.184	-0.170	-0.153	-0.149	-0.133	-0.120
(z_median = 6.42)	σ_log₁₀A	0.028	0.027	0.024	0.019	0.017	0.019	0.018
	σ_{logR_EFF}	0.259	0.247	0.222	0.178	0.158	0.165	0.163

Notes. The best-fit parameters to the size–mass equation: logR_EFF = αlog(M_*/M₀)+logA. Here α is the slope, logA is the intercept at the turn-over stellar mass M₀ = 10⁹M_⊙, and σ_{logR_EFF} is the intrinsic scatter. Due to low number statistics, the slope of the 6 ≤ z < 9 size–mass relation is fixed (see Section 2).

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