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A study of the Jovian forbidden line S II nebula at high spectral resolution (1980)

Roesler, F. L. ; Muench, G. ; Trauger, J. T.

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Publication Date: 2019-06-27

Description: Observations of forbidden line S II 6716-6731 A emissions from the Jovian magnetosphere have been carried out with a PEPSIOS spectrometer at the Hale 5 m telescope. Spectral resolving power was sufficient to resolve the forbidden line S II line widths. From measured 6716-6731 A doublet ratios and spectral line widths a thermal plasma is found characterized by temperatures about 2 x 10 to the 4th K and electron densities about 2000 cu cm. The source of forbidden line S II emissions was centered within a toroidal region of radius 5 Jupiter radii (inside the orbit of Io), with tight latitudinal confinement near the equilibrium equator for ions in the tilted corotating Jovian magnetic field, and significant long-lived longitudinal structure.

Keywords: LUNAR AND PLANETARY EXPLORATION

Type: Astrophysical Journal; vol. 236

Format: text

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