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Three-Dimensional Modelling of EUVE Observations of the Io Plasma Torus

Published online by Cambridge University Press:  12 April 2016

N. Thomas ,
D.E. Innes  and
R. Lieu
N. Thomas
Affiliation:
Max-Planck-Institut für Aeronomie, D-37191 Katlenburg-Lindau, Germany
D.E. Innes
Affiliation:
Max-Planck-Institut für Aeronomie, D-37191 Katlenburg-Lindau, Germany
R. Lieu
Affiliation:
Center for EUV Astrophysics, 2150 Kittredge St., University of California, Berkeley, CA 94720-5030, USA

Abstract

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First results from a 3-D model of EUVE observations of the Io Plasma Torus are reported. The semi-empirical model calculations follow a method previously used to describe visible and near-UV emissions. The extension to EUV wavelengths is described. Several EUV emissions have been successfully modelled although some discrepancies remain at this stage. Most EUV emissions peak at a jovicentric distance of ≈ 5.8 RJ. The observed dawn-dusk asymmetry of the torus was well fitted with a shift parameter (ϵ) of 0.03. The modelling also indicates that optical depth effects need to be considered for several EUV emission lines.

Type
X. Solar System Observations
Information
International Astronomical Union Colloquium , Volume 152: Astrophysics in the Extreme Ultraviolet , 1996 , pp. 457 - 464
Copyright
Copyright © Kluwer 1996

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