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Title: Determining the Elemental and Isotopic Composition of the Pre-solar Nebula from Genesis Data Analysis: The Case of Oxygen

Here, we compare element and isotopic fractionations measured in bulk solar wind samples collected by NASA's Genesis mission with those predicted from models incorporating both the ponderomotive force in the chromosphere and conservation of the first adiabatic invariant in the low corona. Generally good agreement is found, suggesting that these factors are consistent with the process of solar wind fractionation. Based on bulk wind measurements, we also consider in more detail the isotopic and elemental abundances of O. We also find mild support for an O abundance in the range 8.75–8.83, with a value as low as 8.69 disfavored. A stronger conclusion must await solar wind regime-specific measurements from the Genesis samples.
ORCiD logo [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [5] ;  [4] ;  [5] ;  [2] ; ORCiD logo [6] ; ORCiD logo [7] ; ORCiD logo [8] ; ORCiD logo [6] ; ORCiD logo [8] ;  [9]
  1. Naval Research Lab. (NRL), Washington, DC (United States). Space Science Division
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Earth, Planetary and Space Sciences
  3. California Inst. of Technology (CalTech), Pasadena, CA (United States). Division of Geological and Planetary Sciences
  4. Arizona State Univ., Tempe, AZ (United States). School of Earth and Space Exploration
  5. Univ. of Hawaii, Honolulu, HI (United States). Hawaii Inst. of Geophysics and Planetology
  6. Carnegie Inst. of Washington, Washington, DC (United States). Dept. of Terrestrial Magnetism
  7. Univ. of Montana, Missoula, MT (United States). Dept. of Physics
  8. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Space and Remote Sensing (ISR-2)
  9. California State Univ. (CalState), Fullerton, CA (United States). Dept. of Physics
Publication Date:
Report Number(s):
Journal ID: ISSN 2041-8213; TRN: US1800909
Grant/Contract Number:
Accepted Manuscript
Journal Name:
The Astrophysical Journal. Letters
Additional Journal Information:
Journal Volume: 851; Journal Issue: 1; Journal ID: ISSN 2041-8213
Institute of Physics (IOP)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
National Aeronautics and Space Administration (NASA)
Country of Publication:
United States
79 ASTRONOMY AND ASTROPHYSICS; sun: abundances; sun: chromosphere; solar wind; waves; turbulence
OSTI Identifier: