Toward More Reliable Analytic Thermochemical-equilibrium Abundances

31 Jan 2019 Cubillos Patricio Blecic Jasmina Dobbs-Dixon Ian

Heng & Tsai (2016) developed an analytic framework to obtain thermochemical-equilibrium abundances for H$_{2}$O, CO, CO$_2$, CH$_4$, C$_{2}$H$_{2}$, C$_{2}$H$_{4}$, HCN, NH$_3$, and N$_2$ for a system with known temperature, pressure, and elemental abundances (hydrogen, carbon, nitrogen, and oxygen). However, the implementation of their approach can become numerically unstable under certain circumstances, leading to inaccurate solutions (e.g., ${\rm C/O} \ge 1$ atmospheres at low pressures)... (read more)

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  • EARTH AND PLANETARY ASTROPHYSICS