A stabilizing composition gradient can suppress large overturning motions while permitting double-diffusive convection in small layers separated by interfaces. If heat loss is less efficient than in a single well-mixed adiabat, the planet retains more entropy and contracts more slowly. This is a proposed delayed-cooling contribution to hot-Jupiter radius inflation, with an effectiveness that depends on the gradient and layer structure.

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  1. Delayed cooling of an inflated giant planet
  2. Hot-Jupiter radius inflation
  3. Planetary mass-radius relation
  4. Mass-radius relation
  5. Exoplanet interior
  6. Exoplanet
  7. Astrophysics
  8. Branch of physics
  9. Physics
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