Fig. 2
Models of separate CLV and RM effects of the Ca II K 3933.66 Å line for KELT-9b. The upper panel is the CLV effect-only model, the middle panel is the RM effect-only model, and the bottom panel is the model combing both effects. For fast rotating stars like KELT-9, the RM effect is stronger than the CLV effect. The simulation here is for the 1 Rp case.
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