At z=1-3, 36% of Type II disk galaxies show U-shaped color profiles, far fewer than in the local universe, suggesting rapid migration dominates high-redshift disk formation.
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Color profiles of disk galaxies at $z=1$-$3$ observed with JWST: Implications for outer-disk formation histories
At z=1-3, 36% of Type II disk galaxies show U-shaped color profiles, far fewer than in the local universe, suggesting rapid migration dominates high-redshift disk formation.