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Fig. 1

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Observational results from the HPF transit observations across the full orbit of HAT-P-32 b (Zhang et al. 2023) and HAT-P-67 b (Gully-Santiago et al. 2024). Top two panels: He I 1083 nm EWs as a function of orbital phase. The dashed gray lines mark the beginning, middle, and end of the optical transits. Bottom two panels: velocity shifts of the planetary He I 1083 nm excess absorption only across the orbital phase. The solid gray line represents the planetary orbital motion, as the velocity shifts are measured in the stellar rest frame. Both planets show a longer pre-transit absorption than post-transit absorption, and the He I 1083 nm excess absorption is highly blueshifted for the pre-transit phases.

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