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

Bhardwaj, A. ; Gladstone, G. R. ; Elsner, R. F. ; Waite Jr., J. H. ; Grodent, D. ; Cravens, T. E. ; Howell, R. R. ; Metzger, A. E. ; Ostgaard, N. ; Maurellis, A. N. ; Johnson, R. E. ; Weisskopf, M. C. ; Majeed, T. ; Ford, P. G. ; Tennant, A. F. ; Clarke, J. T. ; Lewis, W. S. ; Hurley, K. C. ; Crary, F. J. ; Feigelson, E. D. ; Garmire, G. P. ; Young, D. T. ; Dougherty, M. K. ; Espinosa, S. A. ; Jahn, J. -M. (2006) Soft X-ray emissions from Planets, Moons, and Comets European Space Agency - Special Publication (ESA SP), 514 . pp. 215-226. ISSN 0379-6566

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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 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 mainly result 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.

Item Type:Article
Source:Copyright of this article belongs to IEEE.
ID Code:74526
Deposited On:15 Dec 2011 11:44
Last Modified:18 May 2016 18:54

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