Determining the Elemental and Isotopic Composition of the Pre-solar Nebula from Genesis Data Analysis: The Case of Oxygen
Abstract
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 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.
Additional Information
© 2017 The American Astronomical Society. Received 2017 August 29; revised 2017 October 30; accepted 2017 November 20; published 2017 December 6. This work was supported by grants from the NASA Heliophysics Supporting Research (NNH16AC39I) and Laboratory Analysis of Returned Samples Programs (NNH17AE60I, NNH15AZ67I, NNX15AG19G) and by basic research funds of the Chief of Naval Research. We are grateful to Yuan-Kuen Ko for discussions of ACE data.Attached Files
Published - Laming_2017_ApJL_851_L12.pdf
Accepted Version - nihms955592.pdf
Submitted - 1711.07503.pdf
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Additional details
- PMCID
- PMC5893144
- Eprint ID
- 83730
- Resolver ID
- CaltechAUTHORS:20171206-112123892
- NNH16AC39I
- NASA
- NNH17AE60I
- NASA
- NNH15AZ67I
- NASA
- NNX15AG19G
- NASA
- Chief of Naval Research
- Created
-
2017-12-07Created from EPrint's datestamp field
- Updated
-
2022-03-21Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences