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A Window for Water-hydrogen Demixing on Warm Metal-rich Sub-Neptunes

  • Authors: Caroline Piaulet-Ghorayeb, Daniel P. Thorngren, Eliza M.-R. Kempton, Justin Lipper, Leslie Rogers, Fernanda Correa Horta, Shi Lin Sun

Caroline Piaulet-Ghorayeb et al 2026 The Astrophysical Journal 1006 .

  • Provider: AAS Journals

Caption: Figure 6.

Coexistence curves for hydrogen and water in pressure–metallicity space, for four different temperatures. Vertical lines indicate 1–1000× solar metallicity. The corresponding mean molecular weight values are indicated at the top. Demixing is easier to achieve in colder envelopes with moderate metal enrichments.

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