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Elemental compositions of comet 81P/Wild 2 samples collected by Stardust |
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| Authors: | Flynn George J Bleuet Pierre Borg Janet Bradley John P Brenker Frank E Brennan Sean Bridges John Brownlee Don E Bullock Emma S Burghammer Manfred Clark Benton C Dai Zu Rong Daghlian Charles P Djouadi Zahia Fakra Sirine Ferroir Tristan Floss Christine Franchi Ian A Gainsforth Zack Gallien Jean-Paul Gillet Philippe Grant Patrick G Graham Giles A Green Simon F Grossemy Faustine Heck Philipp R Herzog Gregory F Hoppe Peter Hörz Friedrich Huth Joachim Ignatyev Konstantin Ishii Hope A Janssens Koen Joswiak David Kearsley Anton T Khodja Hicham Lanzirotti Antonio Leitner Jan Lemelle Laurence |
| Institution: | Department of Physics, State University of New York at Plattsburgh, 101 Broad Street, Plattsburgh, NY 12901, USA. george.flynn@plattsburgh.edu |
| 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 ( approximately 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. |
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