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University of Illinois Urbana-Champaign
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Infrared spectroscopy of hot methane: empirical line lists within the 1 - 2 μm region
Wong, Andy
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https://hdl.handle.net/2142/91201
Description
Title
Infrared spectroscopy of hot methane: empirical line lists within the 1 - 2 μm region
Author(s)
Wong, Andy
Contributor(s)
Bernath, Peter F.
Hargreaves, Robert J.
Issue Date
2016-06-23
Keyword(s)
Astronomy
Date of Ingest
2017-01-26T21:39:38Z
Abstract
Methane is one of the many hydrocarbons that is found in cool planetary atmospheres in our solar system. Its prominence also extents to hot sub-stellar environments such as brown dwarfs and hot Jupiter exoplanets. High resolution transmission spectra (0.02 \wn) have been recorded at eight different temperatures (between 294 - 1000 K) within the 1 - 2 $\mu$m region using a Fourier transform infrared spectrometer and tube furnace. From these observations, temperature dependent empirical line lists have been produced that include line position, intensity, lower state energy and possible quantum number assignments. Our line lists and spectra can be used to directly simulate the atmospheric spectra of brown dwarfs and exoplanets. These experimental line lists are also compared to predictions from \textit{ab initio} variational calculations that are known to have diminished accuracy in the 1 - 2 $\mu$m region.
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