We present comprehensive experimental line lists of methane (CH4) at high temperatures obtained by recording Fourier transform infrared emission spectra. Calibrated line lists are presented for the temperatures 300 - 1400 degC at twelve 100 degC intervals spanning the 960 - 5000 cm-1 (2.0 - 10.4 microns) region of the infrared. This range encompasses the dyad, pentad and octad regions, i.e., all fundamental vibrational modes along with a number of combination, overtone and hot bands. Using our CH4 spectra, we have estimated empirical lower state energies (Elow in cm-1) and our values have been incorporated into the line lists along with line positions (cm-1) and calibrated line intensities (S' in cm molecule-1). We expect our hot CH4 line lists to find direct application in the modeling of planetary atmospheres and brown dwarfs.
@article{arxiv.1308.4726,
title = {Hot methane line lists for exoplanet and brown dwarf atmospheres},
author = {R. J. Hargreaves and C. A. Beale and L. Michaux and M. Irfan and P. F. Bernath},
journal= {arXiv preprint arXiv:1308.4726},
year = {2013}
}
Comments
Supplementary material is provided via the Astrophysical Journal reference