Unveiling the internal structure and formation history of the three planets transiting HIP 29442 (TOI-469) with CHEOPS

Open Access

Fig. 11

Numerical densities of relevant elements against the radial distance from the CHAIN runs of the H₂O atmospheres of planets b, c, and d. The different line styles correspond to different species, as explained in the legend. The ∑H entry corresponds to the summed density of all hydrogen species $(H, H^{+}, H^{-}, H_{2}, H_{2}^{+}, H_{2}^{*}, and H_{3}^{+})$ $\[\left(\mathrm{H}, \mathrm{H}^{+}, \mathrm{H}^{-}, \mathrm{H}_2, \mathrm{H}_2^{+}, \mathrm{H}_2^* \text {, and } \mathrm{H}_3^{+}\right)\]$ .

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