Helium and Neon Abundances and Compositions in Cometary Matter

Marty, B; Palma, R L; Pepin, R O; Zimmmermann, L; Schlutter, D J; Burnard, P G; Westphal, A J; Snead, C J; Bajt, S; Becker, R H; Simones, J E

Title: Helium and Neon Abundances and Compositions in Cometary Matter

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Abstract

Materials trapped and preserved in comets date from the earliest history of the solar system. Particles captured by the Stardust spacecraft from comet Wild 2 are indisputable cometary matter available for laboratory study. Here they report measurements of noble gases in Stardust material. neon isotope ratios are within the range observed in 'phase Q', a ubiquitous, primitive organic carrier of noble gases in meteorites. Helium displays {sup 3}He/{sup 4}He ratios twice those in phase Q and in Jupiter's atmosphere. Abundances per gram are surprisingly large, suggesting implantation by ion irradiation. The gases are carried in high temperature igneous grains similar to particles found in other Stardust studies. Collectively the evidence points to gas acquisition in a hot, high ion flux nebular environment close to the young Sun.

Authors:: Marty, B; Palma, R L; Pepin, R O; Zimmmermann, L; Schlutter, D J; Burnard, P G; Westphal, A J; Snead, C J; Bajt, S; Becker, R H; Simones, J E

Publication Date:: Mon Oct 15 00:00:00 EDT 2007

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 957190

Report Number(s):: UCRL-JRNL-235596
Journal ID: ISSN 0193-4511; SCEHDK; TRN: US1002298

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Journal Article

Journal Name:: Science

Additional Journal Information:: Journal Volume: 319; Journal Issue: 5859; Journal ID: ISSN 0193-4511

Country of Publication:: United States

Language:: English

Subject:: 99 GENERAL AND MISCELLANEOUS; 07 ISOTOPES AND RADIATION SOURCES; COMETS; GASES; HELIUM; IRRADIATION; METEORITES; NEON; NEON ISOTOPES; RARE GASES; SOLAR SYSTEM; SUN

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                    Marty, B, Palma, R L, Pepin, R O, Zimmmermann, L, Schlutter, D J, Burnard, P G, Westphal, A J, Snead, C J, Bajt, S, Becker, R H, and Simones, J E. Helium and Neon Abundances and Compositions in Cometary Matter.  United States: N. p., 2007. 
        Web.

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                    Marty, B, Palma, R L, Pepin, R O, Zimmmermann, L, Schlutter, D J, Burnard, P G, Westphal, A J, Snead, C J, Bajt, S, Becker, R H, & Simones, J E. Helium and Neon Abundances and Compositions in Cometary Matter.  United States.

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                    Marty, B, Palma, R L, Pepin, R O, Zimmmermann, L, Schlutter, D J, Burnard, P G, Westphal, A J, Snead, C J, Bajt, S, Becker, R H, and Simones, J E. 2007.  
        "Helium and Neon Abundances and Compositions in Cometary Matter".  United States.  https://www.osti.gov/servlets/purl/957190.

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@article{osti_957190,

  title        = {Helium and Neon Abundances and Compositions in Cometary Matter},

  author       = {Marty, B and Palma, R L and Pepin, R O and Zimmmermann, L and Schlutter, D J and Burnard, P G and Westphal, A J and Snead, C J and Bajt, S and Becker, R H and Simones, J E},

  abstractNote = {Materials trapped and preserved in comets date from the earliest history of the solar system. Particles captured by the Stardust spacecraft from comet Wild 2 are indisputable cometary matter available for laboratory study. Here they report measurements of noble gases in Stardust material. neon isotope ratios are within the range observed in 'phase Q', a ubiquitous, primitive organic carrier of noble gases in meteorites. Helium displays {sup 3}He/{sup 4}He ratios twice those in phase Q and in Jupiter's atmosphere. Abundances per gram are surprisingly large, suggesting implantation by ion irradiation. The gases are carried in high temperature igneous grains similar to particles found in other Stardust studies. Collectively the evidence points to gas acquisition in a hot, high ion flux nebular environment close to the young Sun.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/957190},
  journal      = {Science},

  issn         = {0193-4511},

  number       = 5859,

  volume       = 319,

  place        = {United States},

  year         = {Mon Oct 15 00:00:00 EDT 2007},

  month        = {Mon Oct 15 00:00:00 EDT 2007}

}

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