The Sub-Neptune Desert ·
Hot-Neptune Gap
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seel
.com · period–radius plane · photoevaporation · high-e migration
Regime
P ≲ 3 d
Divide
M ≈ 0.2 M_J
Engine
—
Host star (XUV)
Neptune envelope
Escaping gas / tidal limit
Stripped super-Earth
Empty desert
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.com · The Sub-Neptune Desert: Two Rival Engines Behind the Hot-Neptune Gap