Fig. 6.

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Evolution of the galaxy stellar mass function from z = 6 to z = 13. FirstLight is consistent with pre-JWST observations (Stefanon et al. 2021) at z = 6 but it shows higher numbers of massive galaxies at z = 9, in agreement with JWST results (Harvey et al. 2024; Weibel et al. 2024). Gray solid lines represents FFB model with ϵmax = 0.2 and 1. Simulations by Lovell et al. (2021) and semi-analytical models by Yung et al. (2023) and Mauerhofer & Dayal (2023) show lower values at high masses.
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