A link between Interstellar Formaldehyde and Chondritic and Cometary Organic Solids

Details A link between Interstellar Formaldehyde and Chondritic and Cometary Organic Solids A link between Interstellar Formaldehyde and Chondritic and Cometary Organic Solids

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p14a..05c&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #P14A-05

Biology

[1028] Geochemistry / Composition Of Meteorites, [2129] Interplanetary Physics / Interplanetary Dust, [5205] Planetary Sciences: Astrobiology / Formation Of Stars And Planets, [6224] Planetary Sciences: Solar System Objects / Kuiper Belt Objects

Scientific paper

Molecular spectroscopic evidence derived from C-XANES and 2D 13C Solid State NMR reveals that organic solids typical of primitive chondritic meteorites, Interplanetary Dust Particles (IDPs), and high O/C organic particles, returned from Comet Wild2/81P by the Stardust spacecraft, are predominantly derived from the polymerization of interstellar formaldehyde. Additional evidence for this conclusion comes from comparison of extraterrestrial organic solids with laboratory synthesized formaldehyde (formose) polymer. The fine-scale morphology of the synthesized formaldehyde polymer reveals abundant nanospherules (in 100 nm to 1µm range) that are very similar in size and shape to organic nanospherules ubiquitous in primitive chondritic meteorites. The reactions necessary to synthesize the formose polymer and nanospherules require liquid water, strongly suggesting that at least some organic solids detected in Comet Wild 2/81P and anhydrous IDPs formed in a temporarily wet environment, either within the comet or within the inner solar system with subsequent outward transport to the Kuiper Belt.

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