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Table 4

Resulting Bayesian evidence levels and DSs for WASP-31b.

Model parameters log (E) DS
Flat model 399.69
Rayleigh + CIA 404.39 4.70

Compared to flat model

CaH 397.54 −2.16
TiO 397.72 −1.97
TiH 398.36 −1.34
VO 399.04 −0.65
MgH 400.19 0.50
MgO 401.35 1.66
AlO 401.66 1.97
CN 402.25 2.55
CO2 402.50 2.81
H2CO 402.86 3.17
C2H4 403.26 3.57
FeH 403.34 3.65
CH4 403.35 3.66
C2H2 403.46 3.77
CO 403.50 3.80
HCN 403.53 3.84
ScH 403.72 4.03
AlH 403.79 4.10
NH3 404.30 4.60
CP 404.48 4.78
OH 404.52 4.83
H2O 404.97 5.28
CrH 405.86 6.16

Compared to H2O−only model

H2O + TiO 398.38 −6.59
H2O + CaH 398.73 −6.24
H2O + TiH 398.96 −6.00
H2O + VO 399.57 −5.40
H2O + MgH 401.05 −3.92
H2O + MgO 402.13 −2.84
H2O + AlO 402.36 −2.61
H2O + CN 402.48 −2.48
H2 O + CO2 403.60 −1.37
H2 O + H2 CO 403.64 −1.33
H2 O + CH4 404.02 −0.95
H2 O + CO 404.22 −0.75
H2 O + C2 H4 404.25 −0.72
H2 O + HCN 404.44 −0.53
H2 O + C2 H2 404.44 −0.52
H2 O + AlH 404.48 −0.49
H2 O + ScH 404.66 −0.31
H2 O + OH 404.98 0.01
H2 O + NH3 405.06 0.09
H2 O + CP 405.16 0.19
H2 O + FeH 405.49 0.52
H2 O + CrH 408.25 3.28

Compared to H2 O+CrH model

H2 O + CrH + FeH 407.10 −1.15
H2 O + CrH + Na 407.55 −0.70
H2 O + CrH + CP 408.81 0.56
H2 O + CrH + Na + K 408.93 0.68
H2 O + CrH + NH3 409.23 0.98
H2 O + CrH + K 409.53 1.28

Notes. Except for the flat model, every model includes the opacity caused by Rayleigh scattering and CIA.

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