Extended Data Fig. 4: Contributions of different absorbers to the transit depth.
From: Methane as a dominant absorber in the habitable-zone sub-Neptune K2-18 b
Transmission spectra of K2-18 b calculated for the atmospheric composition shown in Extended Data Fig. 2 using the forward model of TauREx 3 (ref.23). The orange line corresponds to the spectrum with molecular absorption from H2O, CH4, CO, NH3 and collision-induced absorption (CIA) from H2-H2 and H2-He. Other coloured lines show the contribution of each molecule.
