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Hidden water in magma ocean exoplanets
- Source :
- Astrophysical Journal Letters, 922(1):4. IOP PUBLISHING LTD
- Publication Year :
- 2021
-
Abstract
- We demonstrate that the deep volatile storage capacity of magma oceans has significant implications for the bulk composition, interior and climate state inferred from exoplanet mass and radius data. Experimental petrology provides the fundamental properties on the ability of water and melt to mix. So far, these data have been largely neglected for exoplanet mass-radius modeling. Here, we present an advanced interior model for water-rich rocky exoplanets. The new model allows us to test the effects of rock melting and the redistribution of water between magma ocean and atmosphere on calculated planet radii. Models with and without rock melting and water partitioning lead to deviations in planet radius of up to 16% for a fixed bulk composition and planet mass. This is within current accuracy limits for individual systems and statistically testable on a population level. Unrecognized mantle melting and volatile redistribution in retrievals may thus underestimate the inferred planetary bulk water content by up to one order of magnitude.<br />13 pages, 5 figures, ApJL, video summary can be found here: https://bit.ly/DornLichtenberg21video
- Subjects :
- 530 Physics
FOS: Physical sciences
MASS
Mantle (geology)
55 CNC E
Astrobiology
Physics::Geophysics
Atmosphere
RUNAWAY GREENHOUSE
Planet
BIOSIGNATURES
Physics::Atmospheric and Oceanic Physics
Earth and Planetary Astrophysics (astro-ph.EP)
Physics
RADIUS
MANTLE
Astronomy and Astrophysics
Radius
EQUATION-OF-STATE
Exoplanet
SOLIDIFICATION
TERRESTRIAL PLANETS
Space and Planetary Science
SUPER-EARTHS
10231 Institute for Computational Science
Magma
Climate state
Astrophysics::Earth and Planetary Astrophysics
Planetary mass
Astrophysics - Earth and Planetary Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 20418205
- Database :
- OpenAIRE
- Journal :
- Astrophysical Journal Letters, 922(1):4. IOP PUBLISHING LTD
- Accession number :
- edsair.doi.dedup.....c96df1e1a688e0bd18911fe8e08ca1c3