Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.4909b&link_type=abstract
American Astronomical Society, DPS meeting #40, #49.09; Bulletin of the American Astronomical Society, Vol. 40, p.486
Astronomy and Astrophysics
Astronomy
Scientific paper
In order to support remote sensing of Saturn and Jupiter, the infrared spectrum of PH3 was studied using high resolution (R>360000) laboratory spectra obtained with Fourier transform spectrometers. The line positions and intensities involving up to 21 sub-vibrational states were analyzed simultaneously using theoretical models developed in France and extended in Russia. The polyads considered were the Dyad (13 - 7.3 μm), Pentad (5.9 - 3.8 μm) and Octad (3.7 - 3.1 μm). The improved quantum mechanical models were implemented using an effective Hamiltonian in the form of irreducible tensors. The global modeling permitted more extensive quantum assignments to be made for transitions arising from both from the ground state and the two lowest fundamentals. The standard deviations of the global fit represent significant improvement with respect to previous studies of phosphine spectroscopy at these wavelengths. These results will be presented.
Part of the research described in this paper was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with The National Aeronautics and Space Administration. I.K. also thanks the Programme National de Planétologie for funding part of this research.
Brown Linda R.
Butler Rebecca A. H.
Champion John
Kleiner Isabelle
Nikitin Andrei
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