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Research Spending & Results

Award Detail

Doing Business As Name:Washington University
  • Katharina Lodders
  • (314) 935-4851
  • lodders@WUSTL.EDU
  • M. Bruce Fegley
Award Date:08/26/2021
Estimated Total Award Amount: $ 505,505
Funds Obligated to Date: $ 505,505
  • FY 2021=$505,505
Start Date:09/01/2021
End Date:08/31/2024
Transaction Type:Grant
Awarding Agency Code:4900
Funding Agency Code:4900
CFDA Number:47.049
Primary Program Source:040100 NSF RESEARCH & RELATED ACTIVIT
Award Title or Description:Stellar Chemistry: Abundances and Condensation
Federal Award ID Number:2108172
DUNS ID:068552207
Parent DUNS ID:068552207
Program Officer:
  • Harshal Gupta
  • (703) 292-5039

Awardee Location

Street:CAMPUS BOX 1054
City:Saint Louis
County:Saint Louis
Awardee Cong. District:01

Primary Place of Performance

Organization Name:Washington University
County:Saint Louis
Cong. District:01

Abstract at Time of Award

This research project is a comprehensive theoretical investigation of the abundances and properties of elements within the Solar System. The investigators will update and refine so-called “solar abundances,” which are a fundamental reference for determining the properties of gas and dust in space. Results from the study will allow astronomers to accurately interpret observations of a variety of stellar environments and understand how chemistry influences the formation of stars and planets. This project will train a graduate student and provide research opportunities for undergraduate students. Results from the project are expected to be integrated into textbooks, and they will be broadly applicable to physical sciences besides astrophysics. This work seeks to provide a fundamental framework for interpreting abundances and chemical compositions of gas and dust in stellar environments. The researchers will undertake a detailed assessment of elemental and isotopic compositions of all chondritic meteorites and their components to evaluate and model apparent differences in abundance between the solar photosphere and rare “CI chondrites.” They will then use thermochemical models of gas and condensation chemistry to address the apparent abundance variations of refractory elements between the Sun and other G-type stars. The project is expected to result in a significant update to the Solar System elemental and isotopic abundance reference set derived from meteoritic and solar data. It will also complement spectroscopic studies of the atmospheres and circumstellar shells of evolved stars, as well as the analysis of presolar grains isolated from meteorites. This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

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