CARMENES detection of the Ca II infrared triplet and possible evidence of He I in the atmosphere of WASP-76b

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Table 5

Summary of the 3σ upper limits reported for the different species.

Species	3σ upper limit [%]
He I	0.67/0.88 ^(a)
Li I	0.39
K I	0.43
Hα	0.47
Na I D₂	0.48/0.66 ^(a)
Na I D₁	0.48/0.58 ^(a)

Notes. ^(a) Obtained from the MCMC Gaussian fit posteriors, assuming the 3σ upper limit of the absorption excess. The rest of the values are obtained assuming the null hypothesis with the 1-pixel dispersion.

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