Mapping out the parameter space for photoevaporation and core-powered mass-loss

2023/07/31 by Owen, James E., Schlichting, Hilke E. · 10 citations
#Earth and Planetary Astrophysics (astro-ph.EP) #FOS: Physical sciences

paper · doi:10.48550/arxiv.2308.00020

Abstract

Understanding atmospheric escape in close-in exoplanets is critical to interpreting their evolution. We map out the parameter space over which photoevaporation and core-powered mass loss dominate atmospheric escape. Generally, the transition between the two regimes is determined by the location of the Bondi radius (i.e. the sonic point of core-powered outflow) relative to the penetration depth of XUV photons. Photoevaporation dominates the loss when the XUV penetration depth lies inside the Bondi radius (R_XUV

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