Accurate Partition Functions in the Determination of the C_{2} Abundance.

Abstract

view Abstract Citations (7) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Accurate Partition Functions in the Determination of the C_{2} Abundance. Clementi, Enrico Abstract Recent theoretical and experimental data on the diatomic carbon molecule make feasible an accurate calculation of the partition function at high temperatures. All the excited states which contribute to the partition function have been considered A table of thermodynamic functions in the temperature range K is given. The results so obtained are used in the recalculation of the molecular abundance, S, as defined by Russell, Roach, and Hunaerts. In the solar reversing layer the molecular abundance was found to be log S = 12.83. The rotational lines of the 00 band in the Swan system are used to obtain the molecular abundance. The oscillator strength of the Swan system was taken as f = 0 04 and the molecular excitation temperature as T = 4500 K. Our results indicate the importance of accurate partition-function calculations in the determination of the molecular abundance. Publication: The Astrophysical Journal Pub Date: January 1961 DOI: 10.1086/147027 Bibcode: 1961ApJ...133..303C full text sources ADS |