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We study the evolution of the size - stellar mass relation for a large spectroscopic sample of galaxies in the GOODs North field up to z 3. 5. The sizes of the galaxies are measured from Kₒ-band images (corresponding to rest-frame optical/NIR) from the Subaru 8m telescope. We reproduce earlier results based on photometric redshifts that the sizes of galaxies at a given mass evolve with redshift. Specifically, we compare sizes of UV-bright galaxies at a range of redshifts: Lyman break galaxies (LBGs) selected through the U-drop technique (z 2. 5-3. 5), BM/BX galaxies at z 1. 5-2. 5, and GALEX LBGs at low redshift (z 0. 6-1. 5). The median sizes of these UV-bright galaxies evolve as (1+z) ^-1. 110. 13 between z 0. 5-3. 5. The UV-bright galaxies are significantly larger than quiescent galaxies at the same mass and redshift by 0. 450. 09 dex. We also verify the correlation between color and stellar mass density of galaxies to high redshifts. The sizes of sub-mm galaxies in the same field are measured and compared with BM/BX galaxies. We find that median half-light radii of SMGs is 2. 90 0. 45 kpc and there is little difference in their size distribution to the UV-bright star forming galaxies.
Mosleh et al. (Wed,) studied this question.