Document Type
Article
Publication Date
2025
DOI
10.3847/1538-4357/ada24a
Publication Title
The Astrophysical Journal
Volume
979
Issue
2
Pages
149 (1-6)
Abstract
Collision-induced spectra are essential for radiative transfer modeling of Titan's atmosphere. We present experimental spectra of nitrogen–methane mixtures with an accompanying fit of N₂-CH₄ collision-induced absorption in the 30–400 cm⁻¹ region at about 130 K. We found a peak absorption of 2.30 × 10⁻⁵ cm⁻¹ amagat⁻² at 75 cm⁻¹ and a secondary peak of 1.35 × 10⁻⁵ c⁻¹ amagat⁻² at 206.5 cm⁻¹, which agrees with previous studies. Our work does not support the suggestion that N₂-CH₄ CIA in the far-infrared should be increased by about 50%, as suggested by spectroscopic modeling of Titan using data from A. Borysow & C. Tang.
Rights
© 2025 The Authors.
Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Original Publication Citation
Johnson, R. M., Bernath, P. F., Billinghurst, B., & Zhao, J. B. (2025). Collision-induced absorption spectra of N₂ and CH₄. The Astrophysical Journal, 979(2), 1-6, Article 149. https://doi.org/10.3847/1538-4357/ada24a
ORCID
0000-0001-6363-8499 (Johnson), 0000-0002-1255-396X (Bernath)
Repository Citation
Johnson, Ryan M.; Bernath, Peter F.; Billinghurst, Brant; and Zhao, Jianbao, "Collision-Induced Absorption Spectra of N₂ and CH₄" (2025). Chemistry & Biochemistry Faculty Publications. 344.
https://digitalcommons.odu.edu/chemistry_fac_pubs/344
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