Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005dps....37.3018p&link_type=abstract
American Astronomical Society, DPS meeting #37, #30.18; Bulletin of the American Astronomical Society, Vol. 37, p.680
Astronomy and Astrophysics
Astronomy
Scientific paper
The eddy diffusion coefficient (K) in the auroral regions of Jupiter is not known. However, due to the intense auroral energy input, eddy mixing is expected to be much more effective and may be responsible for the enhancement of heavy hydrocarbon production in the polar region. We estimate the increased eddy mixing in the Jovian auroral regions by comparing the Cassini Ultraviolet Imaging Spectrograph (UVIS) observations during the 2000 Jupiter flyby with radiative transfer calculations of the He 584 Å airglow intensity. We derive the range for the eddy diffusion coefficients at the homopause (Kh) in the auroral regions to be at least 8 x 106 cm2 s-1, and possibly greater than 4 x 107 cm2 s-1. By comparison, equitorial Kh is on the order of 2 x 106 cm2 s-1.
Ajello Joseph M.
Parkinson Christopher D.
Stewart Ian F. A.
Wong Ah San
Yung Yuk L.
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