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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 A1.

Spectral centroid offsets in the detector x- and y-directions throughout the observation. The offsets track the shape of the light curve and are approximately symmetric about mid-transit. This is due to the large transit depth causing wavelength-dependent shifts in the stellar spectra as the planet traverses the stellar disk (see illustration in the top panel). These centroid variations are therefore excluded as decorrelation vectors in the light-curve fits.

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