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Meshik A, Mabry J, Hohenberg C, et al. Constraints on neon and argon isotopic fractionation in solar wind. Science. 2007;318(5849):433-5doi: 10.1126/science.1145528.
Meshik, A., Mabry, J., Hohenberg, C., Marrocchi, Y., Pravdivtseva, O., Burnett, D., Olinger, C., Wiens, R., Reisenfeld, D., Allton, J., McNamara, K., Stansbery, E., & Jurewicz, A. J. (2007). Constraints on neon and argon isotopic fractionation in solar wind. Science (New York, N.Y.), 318(5849), 433-5. https://doi.org/10.1126/science.1145528
Meshik, Alex, et al. "Constraints on neon and argon isotopic fractionation in solar wind." Science (New York, N.Y.) vol. 318,5849 (2007): 433-5. doi: https://doi.org/10.1126/science.1145528
Meshik A, Mabry J, Hohenberg C, Marrocchi Y, Pravdivtseva O, Burnett D, Olinger C, Wiens R, Reisenfeld D, Allton J, McNamara K, Stansbery E, Jurewicz AJ. Constraints on neon and argon isotopic fractionation in solar wind. Science. 2007 Oct 19;318(5849):433-5. doi: 10.1126/science.1145528. PMID: 17947578.
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Science. 2007 Oct 19;318(5849):433-5. doi: 10.1126/science.1145528.

Constraints on neon and argon isotopic fractionation in solar wind.

Science (New York, N.Y.)

Alex Meshik, Jennifer Mabry, Charles Hohenberg, Yves Marrocchi, Olga Pravdivtseva, Donald Burnett, Chad Olinger, Roger Wiens, Dan Reisenfeld, Judith Allton, Karen McNamara, Eileen Stansbery, Amy J G Jurewicz

Affiliations

  1. Physics Department, Washington University, St. Louis, MO 63130, USA. [email protected]

PMID: 17947578 DOI: 10.1126/science.1145528

Abstract

To evaluate the isotopic composition of the solar nebula from which the planets formed, the relation between isotopes measured in the solar wind and on the Sun's surface needs to be known. The Genesis Discovery mission returned independent samples of three types of solar wind produced by different solar processes that provide a check on possible isotopic variations, or fractionation, between the solar-wind and solar-surface material. At a high level of precision, we observed no significant inter-regime differences in 20Ne/22Ne or 36Ar/38Ar values. For 20Ne/22Ne, the difference between low- and high-speed wind components is 0.24 +/- 0.37%; for 36Ar/38Ar, it is 0.11 +/- 0.26%. Our measured 36Ar/38Ar ratio in the solar wind of 5.501 +/- 0.005 is 3.42 +/- 0.09% higher than that of the terrestrial atmosphere, which may reflect atmospheric losses early in Earth's history.

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