VULCAN is a software suite that describes atmospheric chemistry: thermochemistry, both in equilibrium and disequilibrium, as well as photochemistry.
The source code is available for you on GitHub to download and contribute to our project: VULCAN
A poster presenting the development of VULCAN: an open-source, 1D chemical kinetics code suited
for the temperature and pressure range relevant to the observable exoplanetary atmospheres. The chemical network is based on a set of reduced rate coefficients including C/H/O mechanism. Several benchmarking and test runs on T-P profiles are shown.
The poster will be on display at the Extreme Solar Systems III conference in Hawaii, 29 Nov. – 4 Dec. 2015.
Kevin and Jim just submitted a paper to the Astrophysical Journal, which presented a novel analytical solution for systems in chemical equilibrium that include carbon dioxide, carbon monoxide, water, methane and acetylene. They used this solution, alongside analytical solutions of temperature-pressure profiles, to show that carbon dioxide is almost always the minor species compared to carbon monoxide and water. They further explored how atmospheric mixing (it does not) and metallicity (requires temperatures hotter than 1000 K and extreme enhancements) affect this conclusion.
Kevin, Jim and Shami just submitted a paper on the theoretical foundations of atmospheric chemistry to the Astrophysical Journal. It unifies the various key quantities and their derivations under a single, common umbrella. It also provides easy-to-use analytical models for molecular abundances vs. carbon-to-oxygen ratio. The formalism sets the stage for the first version of VULCAN.