Stardust Interstellar Preliminary Examination VII: Synchrotron X-ray fluorescence analysis of six Stardust interstellar candidates measured with the Advanced Photon Source 2-ID-D microprobe - Archive ouverte HAL Access content directly
Journal Articles Meteoritics and Planetary Science Year : 2014

Stardust Interstellar Preliminary Examination VII: Synchrotron X-ray fluorescence analysis of six Stardust interstellar candidates measured with the Advanced Photon Source 2-ID-D microprobe

, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , (1) , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,
1
George J. Flynn
  • Function : Author
Steven R. Sutton
  • Function : Author
Barry Lai
  • Function : Author
Sue Wirick
  • Function : Author
Carlton Allen
  • Function : Author
David Anderson
Asna Ansari
  • Function : Author
Saša Bajt
  • Function : Author
Ron K. Bastien
  • Function : Author
Nabil Bassim
  • Function : Author
Hans A. Bechtel
  • Function : Author
Janet Borg
  • Function : Author
Frank E. Brenker
  • Function : Author
John Bridges
  • Function : Author
Donald E. Brownlee
  • Function : Author
Mark Burchell
  • Function : Author
Manfred Burghammer
  • Function : Author
Anna L. Butterworth
  • Function : Author
Hitesh Changela
  • Function : Author
Peter Cloetens
  • Function : Author
Andrew M. Davis
  • Function : Author
Ryan Doll
  • Function : Author
Christine Floss
  • Function : Author
David Frank
  • Function : Author
Zack Gainsforth
  • Function : Author
Eberhard Grün
  • Function : Author
Philipp R. Heck
  • Function : Author
Jon K. Hillier
  • Function : Author
Peter Hoppe
  • Function : Author
Bruce Hudson
  • Function : Author
Joachim Huth
  • Function : Author
Brit Hvide
  • Function : Author
Anton Kearsley
  • Function : Author
Ashley J. King
  • Function : Author
Jan Leitner
  • Function : Author
Hugues Leroux
  • Function : Author
Ariel Leonard
  • Function : Author
Robert Lettieri
  • Function : Author
William Marchant
  • Function : Author
Larry R. Nittler
  • Function : Author
Ryan Ogliore
  • Function : Author
Wei Ja Ong
  • Function : Author
Frank Postberg
  • Function : Author
Mark C. Price
  • Function : Author
Scott A. Sandford
  • Function : Author
Juan-Angel Sans Tresseras
  • Function : Author
Sylvia Schmitz
  • Function : Author
Tom Schoonjans
  • Function : Author
Geert Silversmit
  • Function : Author
Alexandre Simionovici
Vicente A. Sol
  • Function : Author
Ralf Srama
  • Function : Author
Frank J. Stadermann
  • Function : Author
Thomas Stephan
  • Function : Author
Veerle Sterken
  • Function : Author
Julien Stodolna
  • Function : Author
Rhonda M. Stroud
  • Function : Author
Mario Trieloff
  • Function : Author
Peter Tsou
  • Function : Author
Akira Tsuchiyama
  • Function : Author
Tolek Tyliszczak
  • Function : Author
Bart Vekemans
  • Function : Author
Laszlo Vincze
  • Function : Author
Joshua Von Korff
  • Function : Author
Andrew J. Westphal
  • Function : Author
Naomi Wordsworth
  • Function : Author
Daniel Zevin
  • Function : Author
Michael E. Zolensky
  • Function : Author

Abstract

The NASA Stardust spacecraft exposed an aerogel collector to the interstellar dust passing through the solar system. We performed X-ray fluorescence element mapping and abundance measurements, for elements 19 <= Z <= 30, on six "interstellar candidates," potential interstellar impacts identified by Stardust@Home and extracted for analyses in picokeystones. One, I1044,3,33, showed no element hot-spots within the designated search area. However, we identified a nearby surface feature, consistent with the impact of a weak, high-speed particle having an approximately chondritic (CI) element abundance pattern, except for factor-of-ten enrichments in K and Zn and an S depletion. This hot-spot, containing approximately 10 fg of Fe, corresponds to an approximately 350 nm chondritic particle, small enough to be missed by Stardust@Home, indicating that other techniques may be necessary to identify all interstellar candidates. Only one interstellar candidate, I1004,1,2, showed a track. The terminal particle has large enrichments in S, Ti, Cr, Mn, Ni, Cu, and Zn relative to Fe-normalized CI values. It has high Al/Fe, but does not match the Ni/Fe range measured for samples of Al-deck material from the Stardust sample return capsule, which was within the field-of-view of the interstellar collector. A third interstellar candidate, I1075,1,25, showed an Al-rich surface feature that has a composition generally consistent with the Al-deck material, suggesting that it is a secondary particle. The other three interstellar candidates, I1001,1,16, I1001,2,17, and I1044,2,32, showed no impact features or tracks, but allowed assessment of submicron contamination in this aerogel, including Fe hot-spots having CI-like Ni/Fe ratios, complicating the search for CI-like interstellar/interplanetary dust.

Dates and versions

hal-02351156 , version 1 (06-11-2019)

Identifiers

Cite

George J. Flynn, Steven R. Sutton, Barry Lai, Sue Wirick, Carlton Allen, et al.. Stardust Interstellar Preliminary Examination VII: Synchrotron X-ray fluorescence analysis of six Stardust interstellar candidates measured with the Advanced Photon Source 2-ID-D microprobe. Meteoritics and Planetary Science, 2014, 49 (9), pp.1626--1644. ⟨10.1111/maps.12144⟩. ⟨hal-02351156⟩
40 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More