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Table 1.

CIGALE input parameters used to build the mocks SEDs and to fit the spectrum of galaxies at z ≥ 6.

Parameter Value Definition
Stochastic SFH – STOCHASTICSFH
Age (Myr) 300, 400, 500, 750 For the mock catalog
300, 500, 750, if 6 < z < 7 Age of the galaxy
250, 350, 500, if 7 < z < 9 since first star formation
150, 225, 300, if 9 < z < 12
τmain (Myr) 200, 300, 1000 Time when smooth component peaks
τbreak (Myr) 150 Timescale where the fluctuations are no longer correlated
σ 0.01, 0.1, 0.2, 0.4, 0.6, 0.8, 1.0 One σ per run – burstiness level
α 2 PSD slope
NSFH 500 # of SFH per age value
800

Stellar population – BC03
Metallicity 0.004, 0.02

Emission lines – NEBULAR
log U −3, −2 Ionization parameter
fesc 0.0, 0.1 Lyman continuum photons escape fraction
fdust 0.0, 0.1 Lyman continuum photons fraction absorbed by dust

Dust attenuation – DUSTATT_MODIFIED_STARBURST
E(B–V) lines [0.0, 0.2] Color excess of the nebular lines (8 values linearly sampled)
E(B–V)s factor 0.44 Color excess ratio between continuum & nebular

Notes. Where there is only one row per parameter, the same values were used to build the mock catalog and to fit. In the case of multiple rows, the first one was used to build the mock catalog, and the others were used to fit. This configuration resulted in 92 1600 models per redshift.

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