Hot Experimental Absorption Spectra Of Ch4 In The Pentad And Octad Region

Hargreaves, Robert J.

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https://hdl.handle.net/2142/50909 Copy

Description

Title

Hot Experimental Absorption Spectra Of Ch4 In The Pentad And Octad Region

Author(s)

Hargreaves, Robert J.

Contributor(s)

• Bernath, Peter F.
• Dulick, Michael

Issue Date

2014-06-16

Keyword(s)

Linelists, Lineshapes, Collisions

Abstract

\begin{wrapfigure}{r}{0pt} \includegraphics[scale=0.3]{cropped2.eps} \end{wrapfigure} We present comprehensive line lists of \chem{CH_4} at high temperatures for the pentad and octad region (2400--5000 \wn). These spectra improve on our previous emission measurements for this region\footnote{Hargreaves, R.J., Beale, C.A., Michaux, L., Irfan, M., \& Bernath, P.F. 2012, \textit{ApJ}, 757, 46} by using a new quartz sample cell in conjunction with a tube furnace (pictured). Ten temperatures have been recorded from room temperature up to 1000$^{\circ}$C and our technique involves the acquisition of four separate Fourier transform infrared spectra at each temperature, thus accounting for both the emission and absorption of the molecule and the cell. By combining these four spectra we obtain true transmission spectra of hot \chem{CH_4} in this region. Analysis of this set of spectra enables the production of a line list that includes the position, intensity and empirical lower state energy. Our spectra and line lists can be used directly to model planetary atmospheres and brown dwarfs.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50909

DOI

https://doi.org/10.15278/isms.2014.MK04

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

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