Progress in the measurement on temperature-dependence of H2-broadening of cold and hot CH4

Sung, Keeyoon

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https://hdl.handle.net/2142/96797 Copy

Description

Title

Progress in the measurement on temperature-dependence of H2-broadening of cold and hot CH4

Author(s)

Sung, Keeyoon

Contributor(s)

• Smith, Mary Ann H.
• Mantz, Arlan
• Crawford, Timothy J.
• Benner, D. Chris
• Devi, V. Malathy

Issue Date

2017-06-20

Keyword(s)

Linelists

Abstract

We report preliminary measurements on the temperature dependence of H$_{2}$-broadening of CH$_{4}$ in the near infrared at temperatures between 100 and 370 K. In support of the Jovian and exoplanet atmospheric remote sensing in the near infrared, we have measured the temperature dependence of H$_{2}$-broadened half width and pressure shift coefficients of CH$_{4}$, both of which are known to be rotational quantum number dependent. We studied both cold and hot CH$_{4}$ in the atmospheric K band (~2.2 $mu$m) with the focus on a) weaker lines in the nub{2}+nub{3} band at low temperatures for cold giant planets and b) stronger lines in the nub{3}+nub{4} band at elevated temperatures for extra-solar planets (e.g., hot-Jupiters). Three custom-built gas absorption cells (two cold and one hot) were used to obtain the spectra of CH$_{4}$ and H$_{2}$ mixtures at temperatures between 100 and 370 K. We will discuss our on-going spectrum analysis for a few select {it J} manifolds and provide comparisons with published values, which are available only at room temperature.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/96797

DOI

https://doi.org/10.15278/isms.2017.TJ05

Copyright and License Information

Copyright 2017 Keeyoon Sung

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