Evidence for H2 dissociation and recombination heat transport in the atmosphere of KELT-9b by Mansfield, M, Bean, JL, Stevenson, KB, Komacek, TD, Bell, TJ, Tan, X, Malik, M, Beatty, TG, Wong, I, Cowan, NB, Dang, L, Désert, J-M, Fortney, JJ, Gaudi, BS, Keating, D, Kempton, EM-R, Kreidberg, L, Line, MR, Parmentier, V, Stassun, KG, Swain, MR, Zellem, RT