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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 4.

Derived elemental ratios from semi-free retrievals anchored on 3× (gray) and 10× solar metallicity (blue) PICASO + EPACRIS profiles. We express true C/O in linear scale, while N/O, C/N, and S/N are given in log space normalized to solar values (i.e., [X/H] = ﹩{\mathrm{log}}_{10}\tfrac{({\rm{X}}/{\rm{H}})}{{({\rm{X}}/{\rm{H}})}_{\odot }}﹩). The red lines mark 1× solar abundance for reference. We find that these ratios are all consistent with solar values.

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