Escape of Water- and Metal-enriched Atmospheres from compact Hot mini-Neptunes with CHAIN

arXiv:2606.02083 · astro-ph.EP · Submitted 2026-06-01 · Read on arXiv

Daria Kubyshkina, Jo Ann Egger, Caroline Piaulet-Ghorayeb

astro-ph.EP

Submitted: 2026-06-01

Comments: Accepted for publication in A&A. 20 pages, 7 tables, 13 figures

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Abundance — 55× in this paper · explained in 1 episode
• Metallicity — 16× in this paper · explained in 3 episodes
• Degeneracy — 2× in this paper · explained in 3 episodes
• European Space Agency — 2× in this paper
• Core — 1× in this paper · explained in 2 episodes
• Robustness — 1× in this paper · explained in 5 episodes

Sources

• JWST Reveals CH$_4$, CO$_2$, and H$_2$O in a Metal-rich Miscible Atmosphere on a Two-Earth-Radius Exoplanet
• Water-rich sub-Neptunes and rocky super Earths around different Stars: Radii shaped by Volatile Partitioning, Formation, and Evolution
• The 2025 Release of Cloudy
• A water-rich interior in the temperate sub-Neptune K2-18 b revealed by JWST
• Planetary atmospheres Through Time: Effects of Mass Loss and Thermal Evolution
• Transit Timing Variations in HIP 41378: CHEOPS and TESS confirm a non-transiting sixth planet in the system
• Metal-Enriched Atmospheres in Warm (Super- and Sub-)Neptunes Induced by Extreme Atmospheric Escape
• A window for water-hydrogen demixing on warm metal-rich sub-Neptunes

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