Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.306..571c&link_type=abstract
Nature (ISSN 0028-0836), vol. 306, Dec. 8, 1983, p. 571, 572. NASA-supported research.
Astronomy and Astrophysics
Astronomy
18
Infrared Astronomy, Jupiter Atmosphere, Ortho Hydrogen, Para Hydrogen, Thermodynamic Equilibrium, Infrared Spectrometers, Ortho Para Conversion, Ratios, Voyager Project
Scientific paper
Preliminary results of an analysis of the ortho state/para state ratio (parallel/antiparallel) for molecular H2 in the Jovian atmosphere using Voyager IR spectrometer (IRIS) data are reported. The study was undertaken to expand the understanding of the thermodynamics of a predominantly H2 atmosphere, which takes about 100 million sec to reach equilibrium. IRIS data provided 4.3/cm resolution in the 300-700/cm spectral range dominated by H2 lines. Approximately 600 spectra were examined to detect any disequilibrium between the hydrogen species. The results indicate that the ortho-para ratio is not in an equilibrium state in the upper Jovian troposphere. A thorough mapping of the para-state molecules in the upper atmosphere could therefore aid in mapping the atmospheric flowfield.
Conrath Barney J.
Gierasch Peter J.
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