A core in a star-forming disc as evidence of inside-out growth in the early Universe by Baker, WM, Tacchella, S, Johnson, BD, Nelson, E, Suess, KA, D’Eugenio, F, Curti, M, de Graaff, A, Ji, Z, Maiolino, R, Robertson, B, Scholtz, J, Alberts, S, Arribas, S, Boyett, K, Bunker, AJ, Carniani, S, Charlot, S, Chen, Z, Chevallard, J, Curtis-Lake, E, Danhaive, AL, DeCoursey, C, Egami, E