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Thin H2-dominated Atmospheres as Signposts of Magmatic Outgassing on Tidally Heated Terrestrial Exoplanets

  • Authors: Rahul Arora, Sukrit Ranjan, Pranabendu Moitra, Ananya Mallik

Rahul Arora et al 2026 The Planetary Science Journal 7 .

  • Provider: AAS Journals

Caption: Figure 10.

Evolution of atmosphere mass fraction (Menv/M) over time for L 98-59d, modeled using energy-limited hydrodynamic escape driven by stellar XUV radiation. The shaded region marks the observationally inferred atmosphere mass fractions—interpreted as retention zones for the planet. (C. Cadieux et al. 2025)

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