publication . Article . 2016

MASS–RADIUS RELATION FOR ROCKY PLANETS BASED ON PREM

Stein B. Jacobsen; Dimitar Sasselov; Li Zeng;
Open Access
  • Published: 08 Mar 2016 Journal: The Astrophysical Journal, volume 819, page 127 (eissn: 1538-4357, Copyright policy)
  • Publisher: American Astronomical Society
Abstract
Several small dense exoplanets are now known, inviting comparisons to Earth and Venus. Such comparisons require translating their masses and sizes to composition models of evolved multi-layer-interior planets. Such theoretical models rely on our understanding of the Earth's interior, as well as independently derived equations of state (EOS), but have so far not involved direct extrapolations from Earth's seismic model -PREM. In order to facilitate more detailed compositional comparisons between small exoplanets and the Earth, we derive here a semi-empirical mass-radius relation for two-layer rocky planets based on PREM: ${\frac{R}{R_\oplus}} = (1.07-0.21\cdot \t...
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doi: 10.3847/0004-637x/819/2/127
Subjects
arXiv: Astrophysics::Earth and Planetary AstrophysicsPhysics::GeophysicsAstrophysics::Galaxy Astrophysics
free text keywords: Space and Planetary Science, Astronomy and Astrophysics, Exoplanet, Seismic modeling, Terrestrial planet, Venus, biology.organism_classification, biology, Astrophysics, Equation of state, Radius, Mass fraction, Astronomy, Planet, Physics
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