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Abstract We investigate size variation with rest-frame wavelength for star-forming galaxies based on the second James Webb Space Telescope Advanced Deep Extragalactic Survey data release. Star-forming galaxies are typically smaller at longer wavelengths from the UV to the near-IR at z R e ∝ M * 0.23 ( 1 + z ) − 1.04 at a wavelength of 0.45 μ m, and R e ∝ M * 0.20 ( 1 + z ) − 1.08 at 1.0 μ m. Based on this size evolution and the star formation main sequence from the literature, we obtain the locus of typical size growth for individual galaxies of different masses on the mass–size plane. The moving trend of galaxies on the mass–size plane, which indicates the slopes of their locus, strongly correlates with the size ratio between 0.45 μ m and 1.0 μ m, supporting the idea that the size variation with wavelength provides important information on the size growth of galaxies on short timescales.
Jia et al. (Sun,) studied this question.