![]() ![]() The program is backwards compatible so that the previous version can be easily substituted. FastChem 2 comes now additionally with an optional Python module. The new program code is written in object-oriented C++ and is publicly available under the GNU General Public License version 3 at. Whereas the original version of FastChem is limited to atmospheres containing a significant amount of the element hydrogen, FastChem 2 is also applicable to chemical mixtures dominated by any other species such as carbon dioxide (CO$_2$) or molecular nitrogen ($N_2$) for example. We present FastChem 2, a new version of the established semi-analytical thermochemical equilibrium code FastChem. the atmospheres of extrasolar planets and cool stars. The computation of complex neutral/ionised chemical equilibrium compositions is invaluable to obtain scientific insights of e.g. TEA is available under a reproducible-research, There is a start guide, a user manual, and a code document in addition TEA is written in Python in a modularįormat. We alsoĪpplied the TEA abundance calculations to models of several hot-JupiterĮxoplanets, producing expected results. TEA reproduces their final abundances, but with higher precision. Thermochemical equilibrium code CEA (Chemical Equilibrium with Applications),Īnd the example given by White et al. Tested the code against the method of Burrows & Sharp (1999), the free Particular temperature and pressure or a list of temperature-pressure pairs. Given elemental abundances, TEA calculates molecular abundances for a It applies Gibbsįree-energy minimization using an iterative, Lagrangian optimization scheme. That calculates the abundances of gaseous molecular species. We present an open-source Thermochemical Equilibrium Abundances (TEA) code
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