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°C at twelve 100°C intervals spanning the 960-5000 cm-1 (2.0-10.4 μm) 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 ( ṽ in 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. © 2012. The American Astronomical Society
Original Publication Citation
Hargreaves, R. J., Beale, C. A., Michaux, L., Irfan, M., & Bernath, P. F. (2012). Hot methane line lists for exoplanet and brown dwarf atmospheres. Astrophysical Journal, 757(1), 46 doi:10.1088/0004-637X/757/1/46
Hargreaves, Robert J.; Beale, Christopher A.; Michaux, Laurent; Irfan, Melis; and Bernath, Peter F., "Hot Methane Line Lists for Exoplanet and Brown Dwarf Atmospheres" (2012). Chemistry & Biochemistry Faculty Publications. 85.