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Title: Elemental Compositions of Comet 81P/Wild 2 Samples Collected by Stardust

Abstract

We measured the elemental compositions of material from 23 particles in aerogel and from residue in seven craters in aluminum foil that was collected during passage of the Stardust spacecraft through the coma of comet 81P/Wild 2. These particles are chemically heterogeneous at the largest size scale analyzed ({approx}180 ng). The mean elemental composition of this Wild 2 material is consistent with the CI meteorite composition, which is thought to represent the bulk composition of the solar system, for the elements Mg, Si, Mn, Fe, and Ni to 35%, and for Ca and Ti to 60%. The elements Cu, Zn, and Ga appear enriched in this Wild 2 material, which suggests that the CI meteorites may not represent the solar system composition for these moderately volatile minor elements.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930144
Report Number(s):
BNL-80800-2008-JA
Journal ID: ISSN 0193-4511; SCEHDK; TRN: US200822%%1202
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Science; Journal Volume: 314; Journal Issue: 5806
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; COMETS; DUSTS; METEORITES; CHEMICAL COMPOSITION; national synchrotron light source

Citation Formats

Flynn,G., Bleuet, P., Borg, J., Bradley, J., Brenker, F., Brennan, S., Bridges, J., Brownlee, D., Bullock, E., and et al. Elemental Compositions of Comet 81P/Wild 2 Samples Collected by Stardust. United States: N. p., 2006. Web. doi:10.1126/science.1136141.
Flynn,G., Bleuet, P., Borg, J., Bradley, J., Brenker, F., Brennan, S., Bridges, J., Brownlee, D., Bullock, E., & et al. Elemental Compositions of Comet 81P/Wild 2 Samples Collected by Stardust. United States. doi:10.1126/science.1136141.
Flynn,G., Bleuet, P., Borg, J., Bradley, J., Brenker, F., Brennan, S., Bridges, J., Brownlee, D., Bullock, E., and et al. Sun . "Elemental Compositions of Comet 81P/Wild 2 Samples Collected by Stardust". United States. doi:10.1126/science.1136141.
@article{osti_930144,
title = {Elemental Compositions of Comet 81P/Wild 2 Samples Collected by Stardust},
author = {Flynn,G. and Bleuet, P. and Borg, J. and Bradley, J. and Brenker, F. and Brennan, S. and Bridges, J. and Brownlee, D. and Bullock, E. and et al.},
abstractNote = {We measured the elemental compositions of material from 23 particles in aerogel and from residue in seven craters in aluminum foil that was collected during passage of the Stardust spacecraft through the coma of comet 81P/Wild 2. These particles are chemically heterogeneous at the largest size scale analyzed ({approx}180 ng). The mean elemental composition of this Wild 2 material is consistent with the CI meteorite composition, which is thought to represent the bulk composition of the solar system, for the elements Mg, Si, Mn, Fe, and Ni to 35%, and for Ca and Ti to 60%. The elements Cu, Zn, and Ga appear enriched in this Wild 2 material, which suggests that the CI meteorites may not represent the solar system composition for these moderately volatile minor elements.},
doi = {10.1126/science.1136141},
journal = {Science},
number = 5806,
volume = 314,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}