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Author Barbosa, D. D.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ JUPITER PLANET ♦ AURORAE ♦ X-RAY SPECTRA ♦ ACCELERATION ♦ BREMSSTRAHLUNG ♦ COMPARATIVE EVALUATIONS ♦ ELECTRONS ♦ MATHEMATICAL MODELS ♦ PLANETARY ATMOSPHERES ♦ PLANETARY MAGNETOSPHERES ♦ SOFT X RADIATION ♦ ATMOSPHERES ♦ ELECTROMAGNETIC RADIATION ♦ ELEMENTARY PARTICLES ♦ EVALUATION ♦ FERMIONS ♦ IONIZING RADIATIONS ♦ LEPTONS ♦ PLANETS ♦ RADIATIONS ♦ SPECTRA ♦ X RADIATION ♦ Astrophysics & Cosmology- Planetary Phenomena
Abstract The spectrum of X rays from the planet Jupiter is calculated according to an auroral electron beam model. The electrons are assumed to be accelerated by a field-aligned potential drop and penetrate into the atmosphere as a Maxwellian beam of primaries which are scattered, degraded in energy, and merged with a population of ionization secondaries having a power law energy distribution. The soft X rays observed by the Einstein Observatory satelltie are due to bremsstrahlung from the sedondary electrons in the H{sub 2} atmosphere. A good match to the X ray data is obtained if the power law spectral index of the secondary electrons, {gamma}{sub e}, is {approx equal} 2, yielding a power law slope for the photon flux {gamma}{sub X} = {gamma}{sub e} + 1 {approx equal} 3. The X ray intensity is best reconciled with a beam of primaries having a characteristic energy 30-100 keV and penetrating the homopause with an auroral energy flux typically of 10-20 ergs cm{sup {minus}2} s{sup {minus}1} but no greater than 50 ergs cm{sup {minus}2} s{sup {minus}1}.
ISSN 01480227
Educational Use Research
Learning Resource Type Article
Publisher Date 1990-09-01
Publisher Place United States
Journal Journal of Geophysical Research
Volume Number 95
Issue Number A9


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