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Table 1.

Properties of the high-energy environment of K2-18 b.

Lyman-α flux (erg s−1 cm−2)
EUV 10−91.2 nm flux (erg s−1 cm−2)
Photoionization rate (×10−6 s−1)
Photoionization lifetime (h)
Escape rate at 100% efficiency (×108 g s−1)

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