2004 Annual Science Report

University of California, Los Angeles Reporting  |  JUL 2003 – JUN 2004

Significance of Photochemistry in Determining the Inorganic and Organic Chemistry of Protoplanetary Materials

Project Summary
4 Institutions
3 Teams
0 Publications
0 Field Sites
Field Sites

Project Progress

The goals of this project are to determine the origin of 16O-poor water in the solar nebula, and to predict isotope anomalies in other nebular oxygen reservoirs (e.g., oxygen-containing organics) with an eye towards understanding the significance of photochemistry in determining the inorganic and organic chemistry of protoplanetary materials. James Lyons has converted an atmospheric chemistry model into a one-dimensional (1-D) solar nebula model, and has used the model to show that 16O-poor water is produced in the nebula as a result of photodissociation of CO. These results have been submitted to the journal Nature (authors Lyons and Young), and, after receiving reviews, Lyons is presently making revisions and preparing the manuscript for resubmission. Lyons has presented these results at Lunar and Planetary Science Conference (LPSC) and Goldschmidt meetings during the past year.