Soft x-ray emissions from planets, moons, and comets

A. Bhardwaj, G. R. Gladstone, R. F. Elsner, J. H. Waite, D. Grodent, T. E. Cravens, R. R. Howell, A. E. Metzger, N. Ostgaard, A. N. Manurellis, R. E. Johnson, M. C. Weisskopf, T. Majeed, P. G. Ford, A. F. Tennant, J. T. Clarke, W. S. Lewis, K. C. Hurley, F. J. Crary, E. D. FeigelsonG. P. Garmire, D. T. Young, M. K. Dougherty, S. A. Espinosa, J. M. Jahn

Research output: Contribution to journalConference articlepeer-review

13 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)215-226
Number of pages12
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number514
StatePublished - Oct 1 2002
EventProceedings of the 36th ESLAB Symposium; Earth-Like Planets and Moons - Noordwijk, Netherlands
Duration: Jun 3 2002Jun 8 2002

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science


Dive into the research topics of 'Soft x-ray emissions from planets, moons, and comets'. Together they form a unique fingerprint.

Cite this