Photochemical modeling of K2-18b predicts that N2-dominated nitrogen sources produce undetectable N-species, while NH3-dominated sources would make NH3, CH5N and HCN near-detectable, and that equilibrium chemistry underpredicts the observed CO2.
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Nitrogen chemistry of hycean worlds on the example of K2-18b
Photochemical modeling of K2-18b predicts that N2-dominated nitrogen sources produce undetectable N-species, while NH3-dominated sources would make NH3, CH5N and HCN near-detectable, and that equilibrium chemistry underpredicts the observed CO2.