¹Christiaan P. A. van Buchem,^1,2Yamila Miguel,¹Mantas Zilinskas,³Wim van Westrenen
Meteoritics & Planetary Science (in Press) Open Access Link to Article [https://doi.org/10.1111/maps.13994]
¹Leiden Observatory, Leiden University, Leiden, The Netherlands
²SRON Netherlands Institute for Space Research, Leiden, The Netherlands
³Faculty of Science, Earth Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
Published by arrangement with John Wiley & Sons

To date, over 500 short-period rocky planets with equilibrium temperatures above1500 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 uniqueopportunity to gain insight into their interior compositions through atmosphericobservations. A key process in doing such work is the vapor outgassing from the lavasurface. LavAtmos is an open-source code that calculates the equilibrium chemicalcomposition of vapor above a dry melt for a given composition and temperature. Resultsshow that the produced output is in good agreement with the partial pressures obtainedfrom 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 mantlecompositions of hot rocky exoplanets. In combination with atmospheric chemistry codes,this enables the characterization of interior compositions through atmospheric signatures.