z=4-10 galaxies UV and Opt magnitudes

We derive morphologies of our high-z galaxies, carefully evaluating the systematics of SB profile measurements with Monte Carlo simulations as well as the impacts of a) AGNs, b) multiple clumps including galaxy mergers, c) spatial resolution differences with previous HST studies, and d) strong emission lines, e.g., H{alpha} and [OIII], on optical morphologies with medium-band F410M images.

Conducting Sersic profile fitting for our high-z galaxy SBs with GALFIT, we obtain effective radius ranges for optical re,opt and UV re,UV wavelengths of r_e,opt_=0.05-1.6kpc and r_e,UV_=0.03-1.7kpc that are consistent with previous results within large scatters in the size-luminosity relations. However, we find that the effective radius ratio, r_e,opt_/r_e,UV_, is almost unity, 1.01^+0.35^_-0.22_, over z=4-10 with no signatures of past inside- out star formation such as found at z~0-2.