Galaxy sizes in the early Universe
P. Cataldi, S. Pedrosa, L. J. Pellizza, D. Ceverino, L. A. Bignone
Abstract
We present preliminary results of a study of galaxy sizes at redshift z 5 using the high-resolution, zoom-in FirstLight simulations. We obtain a redshift-independent, chevron-shaped stellar mass--size relation with a peak at M ≈ 108.5~M. This relation is shaped by the individual evolution of galaxies, which undergo a phase of contraction at this mass scale triggered by a strong central starburst.
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