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JWST TRAPPIST-1 e/b Program: Motivation and First Observations

Authors: Natalie H. Allen, Néstor Espinoza, V. A. Boehm, Caleb I. Cañas, Kevin B. Stevenson, Nikole K. Lewis, Ryan J. MacDonald, Brett M. Morris, Eric Agol, Knicole Colón, Hannah Diamond-Lowe, Ana Glidden, Amélie Gressier, Jingcheng Huang, Zifan Lin, Douglas Long, Dana R. Louie, Meredith A. MacGregor, Laurent Pueyo, Benjamin V. Rackham, Sukrit Ranjan, Sara Seager, Guadalupe Tovar Mendoza, Jeff A. Valenti, Daniel Valentine, Roeland P. van der Marel, Hannah R. Wakeford

Natalie H. Allen et al 2026 The Astronomical Journal 171 .

Provider: AAS Journals

Caption: Figure 1.

The atmospheric detection significance as a function of the number of observed close transits for a full Earth-like atmosphere retrieval with POSEIDON. The 10 different noise instances are each given by a different color. With 15 close transits, we are able to achieve at least a Δln Z = 5, “strong evidence” detection of an Earth-like atmosphere.

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