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The future of Genesis science.

D S Burnett1, A J G Jurewicz2,3, D S Woolum4

  • 1Division of Geological and Planetary Sciences California Institute of Technology Pasadena California 91125 USA.

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Genesis spacecraft samples provide new insights into solar abundances, crucial for planetary science. Analysis of solar wind composition helps refine models of solar system formation and planetary material origins.

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Area of Science:

  • Planetary Science
  • Cosmochemistry
  • Solar Physics

Background:

  • Solar abundances are fundamental to planetary science, serving as the baseline composition for the solar nebula.
  • Historically, solar abundances were determined via spectroscopy or indirect proxies like carbonaceous chondrites (CI).
  • The Genesis spacecraft mission aimed to collect solar wind samples for direct laboratory analysis.

Purpose of the Study:

  • To present science rationales for future research objectives concerning solar abundances.
  • To review analytical progress on Genesis samples post-mission.
  • To assess the suitability of Genesis collectors for specific elemental and isotopic analyses.

Main Methods:

  • Laboratory analysis of solar wind samples returned by the Genesis spacecraft.
  • Review of analytical techniques and progress in determining elemental and isotopic abundances.
  • Assessment of elemental fractionation during solar wind extraction from the photosphere.

Main Results:

  • Elemental and isotopic abundances in solar wind samples have been successfully measured, even after the spacecraft's re-entry capsule crash.
  • Significant progress has been made in understanding elemental fractionation processes.
  • The prevailing model of solar abundances remains viable, though isotopic variations in volatile elements warrant further investigation.

Conclusions:

  • Direct measurement of solar wind composition by Genesis offers a new avenue for determining precise solar abundances.
  • Further research objectives are proposed to refine our understanding of solar composition and its implications for planetary formation.
  • The Genesis data continues to support and test existing models of solar system formation.