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Table 4

Five most informative species pairs for each physical parameter.

Molecules nH2 /cm−3 Temperature/K ζζ0 FUV/Habing AV/mag
CO-H2S X X X X
CO-H3O+ X X X
CO-NO X X
HCN-HCN X X
CH2-CO X
NH3-NO X
H3O+-HCO+ X
H3O+-HCN X
H2O-NO X
H2O-H3O+ X
CO-HCS+ X
CH2-H3O+ X
CO-HCO+ X
CO-H2CO X
CO X
CH3CN-CO X
CH2-NH3 X
NO-NO X

Notes. An X indicates that a species is in the top five for a given parameter.

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