Using 455 JWST galaxies plus archival data, metallicity gradients were steep and negative at z>5, nearly flat around z≈2, and steep again at lower redshifts.
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A 13-Billion-Year View of Galaxy Growth: Metallicity Gradient Evolution from the Local Universe to $z=9$ with JWST and Archival Surveys
Using 455 JWST galaxies plus archival data, metallicity gradients were steep and negative at z>5, nearly flat around z≈2, and steep again at lower redshifts.