Soft X-ray Emissions from Planets, Moons, and Comets

Details Soft X-ray Emissions from Planets, Moons, and Comets Soft X-ray Emissions from Planets, Moons, and Comets

2002-09-05

arxiv.org/abs/astro-ph/0209107v1

Astronomy and Astrophysics

Astrophysics

7 pages including 4 figures; Proc.36th ESLAB Symposium "Earth-Like Planets and Moons", June 3-8, 2002, ESTEC, The Netherlands,

Scientific paper

A wide variety of solar system bodies are now known to radiate in the soft x-ray energy (<5 keV) regime. These include planets (Earth, Jupiter, Venus, Saturn, Mars): bodies having thick atmospheres, with or without intrinsic magnetic field; planetary satellites (Moon, Io, Europa, Ganymede): bodies with thin or no atmospheres; and comets and the Io plasma torus: bodies having extended tenuous atmospheres. 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 result mainly from the 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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