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

  • Authors: James T. Sikora, Joe Llama, Rachael M. Roettenbacher, Elisabeth M. Brann, Jean-Michel Désert, Alex S. Polanski, Malena Rice, Lily Zhao

James T. Sikora et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 3.

MASCARA-5 b’s atmospheric temperature (bottom axis) and Fe I VMR (top axis) adopted for the model emission spectrum. The solid blue line is the PT profile, which is based on that used by P25 to detect Fe I with PEPSI@LBT. The dashed blue line shows the Fe I VMRs calculated using FastChem assuming chemical equilibrium and a stellar metallicity of [M/H] = 0.09.

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