Confirmation of Fe I on MASCARA-5 b's Dayside Observed With EXPRES

James T. Sikora, Joe Llama, Rachael M. Roettenbacher +5

MASCARA-5~b/TOI-1431~b is an ultra-hot Jupiter \citep[$P_{\mathrm{orb}}=2.650237\pm 0.000003\mathrm{d}$, $T_{\mathrm{eq}}=2370\pm 70\mathrm{K}$, $M_{\mathrm{p}}=3.12\pm 0.18M_{\mathrm{Jup}}$, $R_{\rm p}=…