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Organic Synthesis via Irradiation and Warming of Ice Grains in the Solar NebulaComplex organic compounds, including many important to life on Earth, are commonly found in meteoritic and cometary samples, though their origins remain a mystery. We examined whether such molecules could be produced within the solar nebula by tracking the dynamical evolution of ice grains in the nebula and recording the environments they were exposed to. We found that icy grains originating in the outer disk, where temperatures were less than 30 K, experienced UV irradiation exposures and thermal warming similar to that which has been shown to produce complex organics in laboratory experiments. These results imply that organic compounds are natural byproducts of protoplanetary disk evolution and should be important ingredients in the formation of all planetary systems, including our own.
Document ID
20120011864
Document Type
Preprint (Draft being sent to journal)
Authors
Ciesla, Fred J. (Chicago Univ. Chicago, IL, United States)
Sanford, Scott A. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 26, 2013
Publication Date
January 1, 2012
Subject Category
Inorganic, Organic and Physical Chemistry
Report/Patent Number
ARC-E-DAA-TN5051
Funding Number(s)
WBS: WBS 811.73.02.07.02.54
Distribution Limits
Public
Copyright
Public Use Permitted.

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