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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 6.

Normalized, stellar rest-frame CCF(Kp, Δv) maps calculated using the model templates generated for Fe I (top row), Fe II (middle row), or Cr I (bottom row). The left and right columns correspond to the combination of the first two nights (2023 October 4 and 2024 November10) and the last two nights (2025 May 9 and 2025 June 23). The dashed black lines indicate the expected Kp = 187.6 km s−1 and Δv = 0 km s−1. The red “x” symbols mark the maximum S/N. Fe I is the only detected species in this study (5.3σ; top left).

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