Jovian aurorae

Physics

Scientific paper

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Scientific paper

We summarize the detection chronology of the multispectral aurorae of Jupiter, and the gradual improvement of our understanding of the aurorae. The aurorae have been sorted by wavelength of the auroral emission: x-ray, ultraviolet, visible, infrared, and radio spectral regions. We present the morphology of the aurorae, where spatially resolved observations have been achieved. We next discuss the derived temperatures of auroral regions, based on ultraviolet, near-infrared, and 0034-4885/61/5/003/img6 auroral spectra. In order to interpret observed intensities, structures, and temperatures, models have been proposed by several authors. These models include electron/ion precipitations, chemical reactions, collisional processes, and radiative transfer processes. By comparing these models with observations, particle precipitation processes and energy budgets have been inferred. We have compared Jovian auroral phenomena with those found in the observations of Earth. We briefly introduce current theories of Earth's auroral particle precipitation/heating processes and plasma wave phenomena which may be similar to the processes in Jupiter's aurorae. We describe aurorae on other Jovian planets, which were first revealed by planetary explorations and orbiting space telescopes. Plans for possible future investigation of these aurorae with the Hubble Space Telescope, Galileo, and ground-based infrared telescopes are also presented.

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