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

VULCAN online!

  • Posted on: 10 December 2016
  • By: tsai

The first version of VULCAN is released. The download is also available in the "Source Code" section. VULCAN is a chemical kinetics for exoplanetary atmospheres. The current version includes C-H-O species. N and photochemistry will be added soon. The theory paper of VULCAN can be found on arXiv.

The chemical impossibility of some previous retrievals

  • Posted on: 9 July 2015
  • By: heng

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.

Atmospheric Chemistry for Astrophysicists

  • Posted on: 20 June 2015
  • By: heng

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.