Mass-Radius Relationships for Solid Exoplanets

  title={Mass-Radius Relationships for Solid Exoplanets},
  author={Sara Seager and Marc J. Kuchner and C. A. Hier-Majumder and Burkhard Militzer},
  journal={The Astrophysical Journal},
  pages={1279 - 1297}
We use new interior models of cold planets to investigate the mass-radius relationships of solid exoplanets, considering planets made primarily of iron, silicates, water, and carbon compounds. We find that the mass-radius relationships for cold terrestrial mass planets of all compositions we considered follow a generic functional form that is not a simple power law: log10 Rs = k1 + log10(Ms) - k2M for up to Mp ≈ 20 M⊕, where Ms and Rs are scaled mass and radius values. This functional form… 
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