Hot Methane Line Lists for Exoplanet and Brown Dwarf Atmospheres

Authors

Robert J. Hargreaves
Christopher A. Beale
Laurent Michaux
Melis Irfan
Peter F. Bernath, Old Dominion UniversityFollow

Document Type

Article

Publication Date

9-2012

DOI

10.1088/0004-637X/757/1/46

Publication Title

Astrophysical Journal

Volume

757

Issue

1

Pages

46 (1-11)

Abstract

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 (E_low 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

Comments

Note: Erratum included.

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

ORCID

0000-0002-1255-396X (Bernath)

Repository Citation

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.
https://digitalcommons.odu.edu/chemistry_fac_pubs/85