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Evidence for interstellar origin of seven dust particles collected by the Stardust spacecraft

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posted on 01.07.2015, 16:39 authored by A. J. Westphal, R. M. Stroud, H. A. Bechtel, F. E. Brenker, A. L. Butterworth, G. J. Flynn, D. R. Frank, Z. Gainsforth, J. K. Hillier, F. Postberg, A. S. Simionovici, V. J. Sterken, L. R. Nittler, C. Allen, D. Anderson, A. Ansari, S. Bajt, R. K. Bastien, N. Bassim, John C. Bridges, D. E. Brownlee, M. Burchell, M. Burghammer, H. Changela, P. Cloetens, A. M. Davis, R. Doll, C. Floss, E. Grün, P. R. Heck, P. Hoppe, B. Hudson, J. Huth, A. Kearsley, A. J. King, B. Lai, J. Leitner, L. Lemelle, A. Leonard, H. Leroux, R. Lettieri, W. Marchant, R. Ogliore, W. J. Ong, M. C. Price, S. A. Sandford, J-A. Sans Tresseras, S. Schmitz, T. Schoonjans, K. Schreiber, G. Silversmit, V. A. Solé, R. Srama, F. Stadermann, T. Stephan, J. Stodolna, S. Sutton, M. Trieloff, P. Tsou, T. Tyliszczak, B. Vekemans, L. Vincze, J. Von Korff, N. Wordsworth, D. Zevin, M. E. Zolensky
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.

History

Citation

Science, 345 (6198), pp. 786-791

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

AM (Accepted Manuscript)

Published in

Science

Publisher

American Association for the Advancement of Science

issn

0036-8075

eissn

1095-9203

Copyright date

2014

Available date

01/07/2015

Publisher version

http://www.sciencemag.org/content/345/6198/786

Associated authors

Stardust@home dusters

Language

en

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