#magma-ocean

[ follow ]
#sub-neptunes #super-earths #primary-atmospheres #radius-valley #exoplanets #hydrogen-dissolution
fromNature
1 week ago

Core-envelope miscibility in sub-Neptunes and super-Earths - Nature

The population of super-Earths and sub-Neptunes, and the origin of the radius valley that separates these two classes of planets, is best explained by cores that are made of an Earth-like composition without a substantial amount of accreted ice8,9,10,11. For sub-Neptunes, the hydrogen-rich envelope overlies the rocky core for billions of years, whereas for super-Earths, the envelope may be retained for about 100 Myr (refs. ).
Science
fromwww.nature.com
3 months ago
Science

Experiments reveal extreme water generation during planet formation

Hydrogen dissolves into silicate melt at high temperatures, reducing iron oxide to produce significant water and iron-enriched blebs during planet formation.
[ Load more ]