4 papers
An Equation of State for Supercritical Silicate-Hydrogen Mixtures at Sub-Neptune Interior Conditions
Sarah P. Marcum, Lars Stixrude, Edward D. Young
Many sub-Neptunes are expected to contain long-lived molten silicate interiors beneath dense H2-rich envelopes. At pressures and temperatures near the atmosphere-interior boundary,…
Ice Giants Revisited: Uranus and Neptune as Magma Ocean Worlds
Edward D. Young, Sarah P. Marcum, Aaron Werlen +1
Uranus and Neptune are commonly interpreted as volatile-rich "ice giants", an assumption that underpins most interior models. Here we show that their observed radii, bulk densities…
Differentiation, the exception not the rule -- Evidence for full miscibility in sub-Neptune interiors
Edward D. Young, Aaron Werlen, Sarah P. Marcum +2
We investigate the consequences of non-ideal mixing between silicate, iron metal, and hydrogen for the structures of the cores of sub-Neptunes with implications for super-Earths, w…
Phase equilibria of sub-Neptunes and super-Earths
Edward D. Young, Lars Stixrude, James G. Rogers +2
We investigate the consequences of non-ideal chemical interaction between silicate and overlying hydrogen-rich envelopes for rocky planets using basic tenets of phase equilibria. B…