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Oxygen as atmospheric thermometer

Oxygen is the building block of key species in planetary atmospheres and a potential life indicator. Ground-based spectroscopy is now used to detect oxygen on an ultra-hot Jupiter and to prove departure from thermochemical equilibrium.

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Fig. 1: Artist’s impression of KELT-9b (bottom) orbiting around its A-type star (top).


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Correspondence to Matteo Brogi.

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Brogi, M. Oxygen as atmospheric thermometer. Nat Astron 6, 182–183 (2022).

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