Simulated retrievals of Earth-through-time and false-positive atmospheres find that HWO requires 0.26-1.7 µm reflected-light spectra at SNR 20-40 to confidently identify O2 and CH4 biosignatures.
This work was supported by NASA Astrophysics Decadal Survey Precursor Science grant 80NSSC23K1471
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Wavelength Requirements for Life Detection via Reflected Light Spectroscopy of Rocky Exoplanets
Simulated retrievals of Earth-through-time and false-positive atmospheres find that HWO requires 0.26-1.7 µm reflected-light spectra at SNR 20-40 to confidently identify O2 and CH4 biosignatures.