NASA NTRS · 20020066766
Soft X-Ray Emissions from Planets and Moons
Abstract
A wide variety of solar system planetary bodies are now known to radiate in the soft x-ray energy (<5 keV) regime. These include planets (Earth, Jupiter, Venus, Saturn): bodies having thick atmosphere and with/without intrinsic magnetic field; planetary satellites (Moon, Io, Europa, Ganymede): bodies with no/thin atmosphere; and comets and Io plasma torus: bodies having extended tenuous atmosphere. Several different mechanisms have been proposed to explain the generation of soft x-rays from these objects. whereas in the hard x-ray energy range (>10 keV) x-rays mainly result from electron bremsstrahlung process. In this paper we present a brief review of the x-ray observations on each of the planetary bodies and discuss their characteristics and proposed source mechanisms.
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Bhardwaj, A., Gladstone, G. R., Elsner, R. F., Waite, J. H., Jr., Grodent, D., Cravens, T. E., Howell, R. R., Metzger, A. E., Ostgaard, N., Maurellis, A., Six, N. Frank. 2002-01-01. Soft X-Ray Emissions from Planets and Moons. https://ntrs.nasa.gov/citations/20020066766
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