Correlated k coefficients for H2-He atmospheres; 180 spectral windows and 1060 pressure-temperature points

There are 72 correlated k-coefficients datasets, using the naming convention m-xxx_coyyy.data.180.tar.zip, where xxx is the metallicity in dex relative to solar, and yyy is the C/O ratio relative to solar, as a multiplication factor. For example a metallicity of 0.0 and a C/O ratio of 1.0 indicates solar abundances. We use the Lodders et al. 2010 value for the solar C/O=0.458. The spectral windows are listed in the file 180_windows.txt (intervals defined as starting at lambda1 and ending at lambda2), and the k-coefficients can be read in and checked using the script in the IDL code read_k_coefficients.pro. The k-coefficients are calculated for a grid of 1060 pressure-temperature points listed in the file PT_list_1060.

The correlated-k coefficients are calculated using pre-mixed opacities, where the abundances for each metallicity-C/O combination have been calculated using equilibrium chemistry, as described in Marley et al. 2021. There are 12 Fe/H values: 0.0, 0.5, 0.7, 1.0, 1.5, 1.5, 1.7, 2.0, -0.25, -0.3, -0.5, -0.75, and -1.0; and 6 C/O values: 0.25, 0.5, 1.0, 1.5, 2.0 and 2.5.

 The opacity sources included in the calculations are: C2H2, C2H4, C2H6, CH4, CO, CO2, CrH, FeH, H2O, H2S, HCN, LiCl, MgH, N2,  NH3, OCS, PH3, SiO, TiO, and VO, in addition to alkali metals (Li, Na, K, Rb, Cs). The references for the line lists and broadening parameters used in these opacity calculations can also be found in Marley et al 2021, and are included here for convenience in the file Table_2_Marley_et.al.2021.png Please include these references, as well as the reference to this Zenodo repository when publishing your paper.

Each dataset contains the following files:

ascii_data: the correlated k coefficients file in ascii format. This can be read by the included IDL code.

binary_data: the correlated k coefficients file in binary format

cp_all: contains the mean molecular weight for each layer. The head capacity values do not include the proper H2 heat capacity and should not be used.

full_abunds: the relative abundances for all the species from the chemistry files, on the 1060-point pressure-temperature grid.

sum_in_atoms: relative abundances for the alkali metals

sum_in_cia: relative abundances for the species that could be used for calculating collision-induced absorption (CIA)

sum_in_layer: relative abundances for all molecules included in the correlated k-coefficients calculations

Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center.