Collision-induced Absorption Spectra of N2 and CH4
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 N _2 -CH _4 collision-induced absorption in the 30–400 cm ^−1 region at about 130 K. We found a peak absorption...
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| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ada24a |
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| author | Ryan M. Johnson Peter F. Bernath Brant Billinghurst Jianbao Zhao |
| author_facet | Ryan M. Johnson Peter F. Bernath Brant Billinghurst Jianbao Zhao |
| author_sort | Ryan M. Johnson |
| collection | DOAJ |
| description | 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 N _2 -CH _4 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 cm ^−1 amagat ^−2 at 206.5 cm ^−1 , which agrees with previous studies. Our work does not support the suggestion that N _2 -CH _4 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. |
| format | Article |
| id | doaj-art-07d7f5b20e594aa2b802b37da8665bea |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-07d7f5b20e594aa2b802b37da8665bea2025-01-23T08:14:33ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01979214910.3847/1538-4357/ada24aCollision-induced Absorption Spectra of N2 and CH4Ryan M. Johnson0https://orcid.org/0000-0001-6363-8499Peter F. Bernath1https://orcid.org/0000-0002-1255-396XBrant Billinghurst2Jianbao Zhao3https://orcid.org/0000-0003-3864-2167Department of Physics, Old Dominion University , Norfolk, VA 23529, USA ; rjohn032@odu.eduDepartment of Physics, Old Dominion University , Norfolk, VA 23529, USA ; rjohn032@odu.edu; Department of Chemistry and Biochemistry, Old Dominion University , Norfolk, VA 23529, USACanadian Light Source Far-Infrared Beamline , 44 Innovation Blvd., Saskatoon, SK S7N 2V3, CanadaCanadian Light Source Far-Infrared Beamline , 44 Innovation Blvd., Saskatoon, SK S7N 2V3, CanadaCollision-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 N _2 -CH _4 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 cm ^−1 amagat ^−2 at 206.5 cm ^−1 , which agrees with previous studies. Our work does not support the suggestion that N _2 -CH _4 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.https://doi.org/10.3847/1538-4357/ada24aCollision physicsTitanRadiative transferAtmospheric extinction |
| spellingShingle | Ryan M. Johnson Peter F. Bernath Brant Billinghurst Jianbao Zhao Collision-induced Absorption Spectra of N2 and CH4 The Astrophysical Journal Collision physics Titan Radiative transfer Atmospheric extinction |
| title | Collision-induced Absorption Spectra of N2 and CH4 |
| title_full | Collision-induced Absorption Spectra of N2 and CH4 |
| title_fullStr | Collision-induced Absorption Spectra of N2 and CH4 |
| title_full_unstemmed | Collision-induced Absorption Spectra of N2 and CH4 |
| title_short | Collision-induced Absorption Spectra of N2 and CH4 |
| title_sort | collision induced absorption spectra of n2 and ch4 |
| topic | Collision physics Titan Radiative transfer Atmospheric extinction |
| url | https://doi.org/10.3847/1538-4357/ada24a |
| work_keys_str_mv | AT ryanmjohnson collisioninducedabsorptionspectraofn2andch4 AT peterfbernath collisioninducedabsorptionspectraofn2andch4 AT brantbillinghurst collisioninducedabsorptionspectraofn2andch4 AT jianbaozhao collisioninducedabsorptionspectraofn2andch4 |