Detectability of atmospheric features of Earth-like planets in the habitable zone around M dwarfs

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Table 4

Mean central wavelengths, λ_c, bandwidths, Δλ and resolving power for selected spectral features and an S/N of 5.

Spectral feature	λ_c (μm)	Δλ(μm)	λ_c/Δλ
H₂O at 1.4 μm	1.38	0.06	23.0
CH₄ at 2.3 μm	2.33	0.15	15.5
CH₄ at 3.4 μm	3.37	0.32	10.5
CO₂ at 4.3 μm	4.27	0.11	38.8
H₂O at 6.3 μm	6.12	0.90	6.8
O₃ at 9.6 μm	9.64	0.44	21.9

Notes. The NIRSpec HRS and MIRI LRS are used to calculate the individual wavelengths and bandwidth for each M-dwarf planet and feature. Values are nearly independent of the distance to the star but dependent on the atmosphere of the planet and the throughput of the filter-disperser combination.

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