title: Interstellar dust. Evidence for interstellar origin of seven dust particles collected by the Stardust spacecraft.
abstract: Seven particles captured by the Stardust Interstellar Dust Collector and returned to Earth for laboratory analysis have features consistent with an origin in the contemporary interstellar dust stream. More than 50 spacecraft debris particles were also identified. The interstellar dust candidates are readily distinguished from debris impacts on the basis of elemental composition and/or impact trajectory. The seven candidate interstellar particles are diverse in elemental composition, crystal structure, and size. The presence of crystalline grains and multiple iron-bearing phases, including sulfide, in some particles indicates that individual interstellar particles diverge from any one representative model of interstellar dust inferred from astronomical observations and theory.
authors.affiliation: Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA, USA. westphal@ssl.berkeley.edu.
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authors.lastname: Westphal
authors.affiliation: Materials Science and Technology Division, Naval Research Laboratory, Washington, DC, USA.
authors.forename: Rhonda M
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authors.lastname: Stroud
authors.affiliation: Advanced Light Source, Lawrence Berkeley Laboratory, Berkeley, CA, USA.
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authors.lastname: Bechtel
authors.affiliation: Geoscience Institute, Goethe University Frankfurt, Frankfurt, Germany.
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authors.affiliation: Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA, USA.
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authors.lastname: Butterworth
authors.affiliation: State University of New York at Plattsburgh, Plattsburgh, NY, USA.
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authors.affiliation: Jacobs Technology/ESCG, NASA Johnson Space Center (JSC), Houston, TX, USA.
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authors.affiliation: Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA, USA.
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authors.affiliation: Institut für Geowissenschaften, University of Heidelberg, Germany.
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authors.affiliation: Institut für Geowissenschaften, University of Heidelberg, Germany.
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authors.affiliation: Institut des Sciences de la Terre, Observatoire des Sciences de l'Univers de Grenoble, Grenoble, France.
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authors.lastname: Simionovici
authors.affiliation: Institut für Raumfahrtsysteme (IRS), University of Stuttgart, Stuttgart, Germany. IGEP, TU Braunschweig, Braunschweig, Germany. Max Planck Institut für Kernphysik, Heidelberg, Germany. International Space Sciences Institute, Bern, Switzerland.
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authors.affiliation: Carnegie Institution of Washington, Washington, DC, USA.
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authors.affiliation: Astromaterials Research and Exploration Science, NASA JSC, Houston, TX, USA.
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authors.affiliation: Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA, USA.
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authors.affiliation: Deutsches Elektronen-Synchrotron, Hamburg, Germany.
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