Models with a T/p profile and abundance that give rise to the strongest cross-correlation signals from the companion. The top panel shows the model with CO as a single trace gas, the middle panel the model with only H₂O, and the bottom panel model contains both CO and H₂O. The temperature is set to decrease from 2150 K at 1 bar to 1100 K at 0.03 bar and is isothermal outside this pressure range. The volume mixing ratios for CO and/or H₂O in these three models are 10^-4.