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•First •Prev •Next •Last •Go Back •Full Screen •Close •Quit From planetology to Hopf algebra, a quantum chemistry story Patrick CASSAM-CHENAI Laboratoire J. A. Dieudonne, Universite de Nice-Sophia-Antipolis Nice, Novembre 2005

  • red wavelengths

  • rotch4 rotch4

  • representative synthetic spectra

  • em per

  • shows red

  • absorption spectrum

  • infrared mapping

  • nh3

  • jupiter's atmosphere

  • ph3 ph3


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Published by
Published 01 November 2005
Reads 13
Language English

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FirstPrevNextaLtsGBocakuFScllenreloCQsetiu
Nice, Novembre 2005
¨ Patrick CASSAM-CHENAI
From planetology to Hopf algebra, a
LaboratoireJ.A.Dieudonn´e,Universit´edeNice-Sophia-Antipolis
quantum chemistry story
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Deficiencies of spectroscopic databases for planetology - I
“The methane opacity dominates the infrared spectrum of Jupiter and other outer planets. This is readily apparent in the Jovian spectra recorded by the Visible and Infrared Mapping Spectrometer on the Cassini spacecraft. The CH4abundances are even greater in the more distant outer planets and Titan.” Spectrosc.L. R. Brown, J. Quant. Radiat. Transfer96, 251-270 (2005).
However in the latest version of the HITRAN database:
Only 1% of the 40256 features of methane between 1.1-1.6 and 1.8-2.1 µm are assigned =one cannot extrapolate the 296K (room tempera-ture) spectra to 50K (typical outer planet atmosphere temperature) or 1000K (typical T-Brown Dwarf temperature)
Without these lines, error bar on the opacity of T-brown dwarf atmo-spheres =factor 2 uncertainty on the age and size of these objects!
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