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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
Subject(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.
Issue Date:6/20/2017
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/96797
DOI:10.15278/isms.2017.TJ05
Date Available in IDEALS:2017-07-27


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