LavAtmos: An open source chemical equilibrium vaporisation code for lava worlds

Abstract

To date, over 500 short-period rocky planets with equilibrium temperatures above 1500 K have been discovered. Such planets are expected to support magma oceans, providing a direct interface between the interior and the atmosphere. This provides a unique opportunity to gain insight into their interior compositions through atmospheric observations. A key process in doing such work is the vapor outgassing from the lava surface. LavAtmos is an open-source code that calculates the equilibrium chemical composition of vapor above a dry melt for a given composition and temperature. Results show that the produced output is in good agreement with the partial pressures obtained from experimental laboratory data as well as with other similar codes from literature. LavAtmos allows for the modeling of vaporization of a wide range of different mantle compositions of hot rocky exoplanets. In combination with atmospheric chemistry codes, this enables the characterization of interior compositions through atmospheric signatures.

13 pages, 6 figures, published in Meteoritics & Planetary Science

References in corpus (13)

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• Theoretical Emission Spectra of Atmospheres of Hot Rocky Super-Earths
• A Case for an Atmosphere on Super-Earth 55 Cancri e
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• A Near-Infrared Chemical Inventory of the Atmosphere of 55 Cancri e
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Cited by in corpus (8)

• A secondary atmosphere on the rocky exoplanet 55 Cancri e
• Super-Earths and Earth-like Exoplanets
• Convective shutdown in the atmospheres of lava worlds
• Characterising the Atmosphere of 55 Cancri e: 1D Forward Model Grid for Current and Future JWST Observations
• LavAtmos 2.0: Incorporating Volatiles Species in Vaporization Models
• Chemical evolution of an evaporating lava pool
• The atmospheres of rocky exoplanets III. Using atmospheric spectra to constrain surface rock composition
• Sensitivity of Dry Lava Planet Atmospheric Emission Spectra to Changes in Lava Compositions