Fig. 5
Simulated atmospheric features of the LHS 1140 b for all three scenarios with H2 - (upper panel) and CO2-dominated atmospheres(lower panel), represented by cloud-free transit transmission spectra and binned to a constant resolving power of R = 300. The scenarios are color-coded: blue for low concentrations of CH4 (scenario 1a for H2- and scenario 10a for CO2-dominated atmospheres), green for medium concentrations of CH4 (scenario 1b for H2- and scenario 10b for CO2-dominated atmospheres), and orange for high concentrations of CH4 (scenario 1c for H2- and scenario 10c for CO2-dominated atmospheres). Important atmospheric molecular absorption are highlighted with horizontal lines in the color of the scenario with a strong absorption feature or in gray when all scenarios show a strong feature. Solid lines include weak extinction from hazes, whereas dashed lines consider extinction by thick hazes.
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