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A low-temperature origin for the planetesimals that formed Jupiter

Author

Listed:
  • Tobias Owen

    (University of Hawaii, Institute for Astronomy)

  • Paul Mahaffy

    (Laboratory for Atmospheres, Goddard Space Flight Center)

  • H. B. Niemann

    (Laboratory for Atmospheres, Goddard Space Flight Center)

  • Sushil Atreya

    (Atmospheric Ocean & Space Science, University of Michigan)

  • Thomas Donahue

    (Atmospheric Ocean & Space Science, University of Michigan)

  • Akiva Bar-Nun

    (Tel-Aviv University)

  • Imke de Pater

    (University of California, Berkeley)

Abstract

The four giant planets in the Solar System have abundances of ‘metals’ (elements heavier than helium), relative to hydrogen, that are much higher than observed in the Sun. In order to explain this, all models for the formation of these planets rely on an influx of solid planetesimals17. It is generally assumed that these planetesimals were similar, if not identical, to the comets from the Oort cloud that we see today. Comets that formed in the region of the giant planets should not have contained much neon, argon and nitrogen, because the temperatures were too high for these volatile gases to be trapped effectively in ice. This means that the abundances of those elements on the giant planets should be approximately solar. Here we show that argon, krypton and xenon in Jupiter's atmosphere are enriched to the same extent as the other heavy elements, which suggests that the planetesimals carrying these elements must have formed at temperatures lower than predicted by present models of giant-planet formation.

Suggested Citation

  • Tobias Owen & Paul Mahaffy & H. B. Niemann & Sushil Atreya & Thomas Donahue & Akiva Bar-Nun & Imke de Pater, 1999. "A low-temperature origin for the planetesimals that formed Jupiter," Nature, Nature, vol. 402(6759), pages 269-270, November.
    • Handle: RePEc:nat:nature:v:402:y:1999:i:6759:d:10.1038_46232
    DOI: 10.1038/46232
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