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Table 2

Fit quality between our circulation models and the measured phase curve of WASP-18b, relative to the best-fitting model.

Model Model Δχ2 Δχ2
tdrag (s) [M/H] per datum
103 −0.5 37 0.2
104 −0.5 0 0.0
No drag −0.5 137 0.6
103 0.0 23 0.1
104 0.0 7 0.0
No drag 0.0 73 0.3
No drag +0.5 70 0.3

Notes. Fit quality is measured by the χ2 between the data and the circulation model.

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