Co₂ Collision-induced Line Parameters In The ν₃ Band Of Ch₄

Bertin, Thibault

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https://hdl.handle.net/2142/111279 Copy

Description

Title

Co₂ Collision-induced Line Parameters In The ν₃ Band Of Ch₄

Author(s)

Bertin, Thibault

Contributor(s)

Vander Auwera, Jean

Issue Date

2021-06-22

Keyword(s)

Lineshapes, collisional effects

Abstract

Methane is present in the atmosphere of a large number of objects in the Solar system and beyond. Probing CH$_4$ in these environments using optical remote sensing relies on the availability of appropriate information characterizing its spectrum. The present work aims to provide the spectroscopic information required to describe the effects of pressure on the infrared spectrum of methane in CO$_2$ dominated atmospheres, to compensate for the scarcity of the information currently available.\footnote{M. Gharavi, S.G. Buckley, J. Mol. Spectrosc. 229 (2005) 78--88.}$^{,}$\footnote{L. Fissiaux \textit{et al.}, J. Mol. Spectrosc. 297 (2014) 35--40.}$^{,}$\footnote{O.M. Lyulin \textit{et al.}, J. Quant. Spectrosc. Radiat. Transf. 147 (2014) 164--170.}$^{,}$\footnote{E. Es-Sebbar, A. Farooq, J. Quant. Spectrosc. Radiat. Transf. 149 (2014) 241--252.}$^{,}$\footnote{J. Manne \textit{et al.}, J. Quant. Spectrosc. Radiat. Transf. 191 (2017) 59--66.}$^{,}$\footnote{B. Vispoel \textit{et al.}, J. Quant. Spectrosc. Radiat. Transf. 360 (2019) 1--6.} High resolution Fourier transform spectra of methane diluted in carbon dioxide at total pressures up to 800 hPa have been recorded at room temperature in the pentad region around 3.3 $\mu$m. Their analysis is being carried out using multi-spectrum fitting techniques\footnote{D.C. Benner \textit{et al.}, J. Quant. Spectrosc. Radiat. Transf. 53 (1995) 705--721.} and a quadratic speed-dependent Rautian line shape model with line mixing. Results will be presented and discussed. \vspace{24pt} \small \noindent \textit{\textbf{Acknowledgements}: T. Bertin thanks the FRIA (Belgium) for a PhD fellowship. This work is financially supported by the ``Fonds de la Recherche Scientifique''--FNRS (Belgium).}

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

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http://hdl.handle.net/2142/111279

DOI

10.15278/isms.2021.TM09

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