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C, N, O, S, and Photochemistry in a Temperate Giant Planet Orbiting a Late M Dwarf

  • Authors: Michael Zhang, Qiao Xue, Jeehyun Yang, Vighnesh Nagpal, Michael R. Line, Guangwei Fu, Matthew C. Nixon, Jacob L. Bean, Peter Gao, Eliza M.-R. Kempton, Luis Welbanks, Edward M. Bryant, Daniel Bayliss, Madison Brady, Jean-Michel Désert, Vincent Van Eylen, Jonathan J. Fortney, Andrés Jordán, Vivien Parmentier, Caroline Piaulet-Ghorayeb, Elyar Sedaghati, Kevin B. Stevenson, Amaury H. M. J. Triaud

Michael Zhang et al 2026 The Astrophysical Journal Letters 1009 .

  • Provider: AAS Journals

Caption: Figure 3.

VMR profiles of the retrieved species. The solid black line represents the 3× solar metallicity photochemistry model from EPACRIS. The dashed line and shaded band show the median and 1σ credible interval of the semi-free retrieval, in which each VMR profile is scaled by a multiplicative factor (with H2S and CS2 sharing a common factor), blue for 3× metallicity baseline model and red for 10×. We also show the 3σ NH3 VMR constraint (gray shaded band), along with the profiles computed for different assumed values of Tint (the other species are not as sensitive to the internal temperature).

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