An equation of state of CO for use in planetary modeling

M. Podolak*, A. Levi, A. Vazan, U. Malamud

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Although carbon monoxide (CO) is an abundant molecule and may have great importance for planetary interiors, measurements of its properties are difficult due to its extreme volatility. We calculate the equation of state for CO over a range of temperature and density that is applicable to the conditions in planetary interiors. Previous experimental and theoretical studies cover only a limited temperature–density range. Our calculations match these early results well, but now cover the full range of relevance. The method of calculation is based on the general-purpose quotidian equation of state described by More et al. (1988), which is here used in order to generate a freely downloadable look-up table to be used by the community.

Original languageEnglish
Article number115424
StatePublished - Apr 2023


FundersFunder number
ISF, Israel773/21, 770/21
Pazy Fund of the Israel Atomic Energy Commission
Simons Foundation290360
FAS Division of Science, Harvard University


    • Carbon monoxide
    • Equation of state
    • Planetary interiors


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