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2 results

  • Chemistry in the Outer Solar System
  • Tobias C. Owen, Paul Mahaffy, H. B. Niemann, S. K. Atreya, T. M. Donahue, A. Bar-Nun, I. de Pater
  • Journal: Symposium - International Astronomical Union / Volume 197 / 2000
  • Published online by Cambridge University Press: 25 May 2016, pp. 483-490
  • Print publication: 2000
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    The discovery by the Galileo Probe Mass Spectrometer that argon is enriched to the same extent as carbon and sulfur on Jupiter requires a revision of models for the formation of this giant planet. Evidently the excess heavy elements were carried to Jupiter in icy planetesimals that formed at temperatures ≤ 30 K. This result indicates that there is no original significance in the present position of Jupiter's orbit.

  • Composition and Cloud Structure of Jupiter’s Deep Atmosphere
  • Sushil K. Atreya, Paul R. Mahaffy, Hasso B. Niemann, Tobias C. Owen
  • Journal: Highlights of Astronomy / Volume 12 / 2002
  • Published online by Cambridge University Press: 30 March 2016, pp. 597-601
  • Print publication: 2002
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    Abundances of ammonia, hydrogen sulfide, water, methane and other hydrocarbons, noble gases and their isotopes, etc. were measured for the first time to the 22 bar level. The ratios of the heavy elements to hydrogen were found to be enriched by a factor of 2-3 relative to solar, implying a large influx of cold planetesimals into Jupiter.