A density-dependent top-heavy stellar IMF brightens z=10-15 galaxies by ~1-1.3 mag in the UV, easing the JWST bright-galaxy tension; extra dust from the massive stars offsets much of the boost by z=5.
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Cosmological simulations of the high-redshift galaxy population adopting a variable stellar initial mass function
A density-dependent top-heavy stellar IMF brightens z=10-15 galaxies by ~1-1.3 mag in the UV, easing the JWST bright-galaxy tension; extra dust from the massive stars offsets much of the boost by z=5.