Sukrit Ranjan: New near-UV H2O cross-sections and the photochemistry of early Earth-analog exoplanets

ExoplanetsIII Heidelberg - HeidelbergDec 20, 2020
Atmospheric theory
We use new laboratory measurements to dramatically revise theoretical predictions of the concentrations of spectrally active trace gases in CO2-rich habitable exoplanet atmospheres, and eliminate a key O2 false positive scenario. CO2-rich atmospheres are expected on rocky worlds orbiting younger, fainter stars (e.g., early Earth, Kasting et al. 1993), and ...
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