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Organic compound alteration during hypervelocity collection of carbonaceous materials in aerogel
Author(s) -
SPENCER M. K.,
CLEMETT S. J.,
SANDFORD S. A.,
McKAY D. S.,
ZARE R. N.
Publication year - 2009
Publication title -
meteoritics and planetary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.09
H-Index - 100
eISSN - 1945-5100
pISSN - 1086-9379
DOI - 10.1111/j.1945-5100.2009.tb00714.x
Subject(s) - aerogel , comet , hypervelocity , particle (ecology) , astrobiology , materials science , organic matter , mass spectrometry , carbon fibers , chemical engineering , mineralogy , chemistry , composite material , geology , organic chemistry , chromatography , physics , astronomy , oceanography , composite number , engineering
— The NASA Stardust mission brought to Earth micron‐size particles from the coma of comet 81P/Wild 2 using aerogel, a porous silica material, as the capture medium. A major challenge in understanding the organic inventory of the returned comet dust is identifying, unambiguously, which organic molecules are indigenous to the cometary particles, which are produced from carbon contamination in the Stardust aerogel, and which are cometary organics that have been modified by heating during the particle capture process. Here it is shown that 1) alteration of cometary organic molecules along impact tracks in aerogel is highly dependent on the original particle morphology, and 2) organic molecules on test‐shot terminal particles are mostly preserved. These conclusions are based on two‐step laser mass spectrometry (L 2 MS) examinations of test shots with organic‐laden particles (both tracks in aerogel and the terminal particles themselves).