TY  - JOUR
AU  - Cody, George D.
AU  - Ade, Harald
AU  - Alexander, M. O'D.
AU  - Araki, Tohru
AU  - Butterworth, Anna
AU  - Fleckenstein, Holger
AU  - Flynn, George
AU  - Gilles, Mary K.
AU  - Jacobsen, Chris
AU  - Kilcoyne, A. L. D.
AU  - Messenger, Keiko
AU  - Sandford, Scott A.
AU  - Tyliszczak, Tolek
AU  - Westphal, Andrew J.
AU  - Wirick, Sue
AU  - Yabuta, Hikaru
TI  - Quantitative organic and light-element analysis of comet 81P/Wild 2 particles using C-, N-, and O-μ-XANES
JO  - Meteoritics & planetary science
VL  - 43
IS  - 1-2
SN  - 1945-5100
CY  - Hoboken, NJ
PB  - Wiley-Blackwell
M1  - PUBDB-2016-00367
SP  - 353 - 365
PY  - 2008
AB  - Synchrotron-based soft X-ray micro-analysis was performed on particles extracted fromthe Stardust aerogel collector in order to obtain detailed organic functional group information on anyorganic solids captured as part of the Principal Examination suite of analyses for samples from comet81P/Wild 2. It is observed that cometary organic carbon captured in aerogel is present in a number ofdifferent manifestations and often intimately associated with silicates. Carbon X-ray absorption nearedge structure (XANES) spectra reveal considerable chemical complexity in all of the organicparticles studied so far. Universally, the comet 81P/Wild 2 organic particles contain lowconcentrations of aromatic and/or olefinic carbon relative to aliphatic and heteroatom-containingfunctional groups, e.g., amide, carboxyl, and alcohol/ethers. N-XANES confirms the presence andassignments of these functional groups. In general, the XANES data record considerable chemicalcomplexity across the range of organic samples currently analyzed. The atomic ratios, N/C and O/C,derived from XANES data reveal a wide range in heteroatom content; in all cases these elementalratios are higher than that of primitive meteoritic organic matter. The wide range in chemistry, bothin elemental abundances and specific organic functional groups, suggests that the comet 81P/Wild 2organic solids may have multiple origins.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:00
DO  - DOI:10.1111/j.1945-5100.2008.tb00627.x
UR  - https://bib-pubdb1.desy.de/record/293202
ER  -