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Elemental abundances of major elements in the solar wind as measured in Genesis targets and implications on solar wind fractionation

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Elemental abundances of major elements in the solar wind as measured in Genesis targets and implications on solar wind fractionation. / Heber, Veronika; McKeegan, Kevin; Steele, Robert C. J.; Jurewicz, Amy; Rieck, Karen; Guan, Yunbin; Wieler, Rainer; Burnett, Donald S.

In: Astrophysical Journal, Vol. 907, No. 1, 15, 20.01.2021.

Research output: Contribution to journalArticlepeer-review

Harvard

Heber, V, McKeegan, K, Steele, RCJ, Jurewicz, A, Rieck, K, Guan, Y, Wieler, R & Burnett, DS 2021, 'Elemental abundances of major elements in the solar wind as measured in Genesis targets and implications on solar wind fractionation', Astrophysical Journal, vol. 907, no. 1, 15. https://doi.org/10.3847/1538-4357/abc94a

APA

Heber, V., McKeegan, K., Steele, R. C. J., Jurewicz, A., Rieck, K., Guan, Y., Wieler, R., & Burnett, D. S. (2021). Elemental abundances of major elements in the solar wind as measured in Genesis targets and implications on solar wind fractionation. Astrophysical Journal, 907(1), [15]. https://doi.org/10.3847/1538-4357/abc94a

Vancouver

Heber V, McKeegan K, Steele RCJ, Jurewicz A, Rieck K, Guan Y et al. Elemental abundances of major elements in the solar wind as measured in Genesis targets and implications on solar wind fractionation. Astrophysical Journal. 2021 Jan 20;907(1). 15. https://doi.org/10.3847/1538-4357/abc94a

Author

Heber, Veronika ; McKeegan, Kevin ; Steele, Robert C. J. ; Jurewicz, Amy ; Rieck, Karen ; Guan, Yunbin ; Wieler, Rainer ; Burnett, Donald S. / Elemental abundances of major elements in the solar wind as measured in Genesis targets and implications on solar wind fractionation. In: Astrophysical Journal. 2021 ; Vol. 907, No. 1.

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@article{e1d31cae5f874a9f9a2634dd7ee0bcef,
title = "Elemental abundances of major elements in the solar wind as measured in Genesis targets and implications on solar wind fractionation",
abstract = "We present elemental abundance data of C, N, O, Na, Mg, Al, Ca, and Cr in Genesis silicon targets. For Na, Mg, Al, and Ca, data from three different SW regimes are also presented. Data were obtained by backside depth profiling using Secondary Ion Mass Spectrometry. The accuracy of these measurements exceeds those obtained by in-situ observations; therefore the Genesis data provide new insights into elemental fractionation between Sun and solar wind, including differences between solar wind regimes. We integrate previously published noble gas and hydrogen elemental abundances from Genesis targets, as well as preliminary values for K and Fe. The abundances of the solar wind elements measured display the well-known fractionation pattern that correlates with each element's First Ionization Potential (FIP). When normalized either to spectroscopic photospheric solar abundances or to those derived from CI-chondritic meteorites, the fractionation factors of low-FIP elements (K, Na, Al, Ca, Cr, Mg, Fe) are essentially identical within uncertainties, but the data are equally consistent with an increasing fractionation with decreasing FIP. The elements with higher FIPs between ~11 and ~16 eV (C, N, O, H, Ar, Kr, Xe) display a relatively well-defined trend of increasing fractionation with decreasing FIP, if normalized to modern 3D photospheric model abundances. Among the three Genesis regimes, the Fast SW displays the least elemental fractionation for almost all elements (including the noble gases) but differences are modest: for low-FIP elements the precisely measured Fast-Slow SW variations are less than 3%. ",
keywords = "Solar wind, Solar abundances, Fast solar wind, Slow solar wind, Solar coronal mass ejections, Chemical abundances",
author = "Veronika Heber and Kevin McKeegan and Steele, {Robert C. J.} and Amy Jurewicz and Karen Rieck and Yunbin Guan and Rainer Wieler and Burnett, {Donald S.}",
note = "The UCLA ion microprobe facility is partially supported by a grant from the NSF Instrumentation and Facilities program. V. S. Heber thanks NASA for financial support. This work was supported by grants from the NASA Laboratory Analysis of Returned Samples (LARS) program (NASA LARS 80NSSC17K0025 to D. S. Burnett and A. J. G. Jurewicz). R. Wieler acknowledges the hospitality of Caltech's Division of Geologial and Planetary Sciences during his stay in Pasadena.",
year = "2021",
month = jan,
day = "20",
doi = "10.3847/1538-4357/abc94a",
language = "English",
volume = "907",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "American Astronomical Society",
number = "1",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Elemental abundances of major elements in the solar wind as measured in Genesis targets and implications on solar wind fractionation

AU - Heber, Veronika

AU - McKeegan, Kevin

AU - Steele, Robert C. J.

AU - Jurewicz, Amy

AU - Rieck, Karen

AU - Guan, Yunbin

AU - Wieler, Rainer

AU - Burnett, Donald S.

N1 - The UCLA ion microprobe facility is partially supported by a grant from the NSF Instrumentation and Facilities program. V. S. Heber thanks NASA for financial support. This work was supported by grants from the NASA Laboratory Analysis of Returned Samples (LARS) program (NASA LARS 80NSSC17K0025 to D. S. Burnett and A. J. G. Jurewicz). R. Wieler acknowledges the hospitality of Caltech's Division of Geologial and Planetary Sciences during his stay in Pasadena.

PY - 2021/1/20

Y1 - 2021/1/20

N2 - We present elemental abundance data of C, N, O, Na, Mg, Al, Ca, and Cr in Genesis silicon targets. For Na, Mg, Al, and Ca, data from three different SW regimes are also presented. Data were obtained by backside depth profiling using Secondary Ion Mass Spectrometry. The accuracy of these measurements exceeds those obtained by in-situ observations; therefore the Genesis data provide new insights into elemental fractionation between Sun and solar wind, including differences between solar wind regimes. We integrate previously published noble gas and hydrogen elemental abundances from Genesis targets, as well as preliminary values for K and Fe. The abundances of the solar wind elements measured display the well-known fractionation pattern that correlates with each element's First Ionization Potential (FIP). When normalized either to spectroscopic photospheric solar abundances or to those derived from CI-chondritic meteorites, the fractionation factors of low-FIP elements (K, Na, Al, Ca, Cr, Mg, Fe) are essentially identical within uncertainties, but the data are equally consistent with an increasing fractionation with decreasing FIP. The elements with higher FIPs between ~11 and ~16 eV (C, N, O, H, Ar, Kr, Xe) display a relatively well-defined trend of increasing fractionation with decreasing FIP, if normalized to modern 3D photospheric model abundances. Among the three Genesis regimes, the Fast SW displays the least elemental fractionation for almost all elements (including the noble gases) but differences are modest: for low-FIP elements the precisely measured Fast-Slow SW variations are less than 3%.

AB - We present elemental abundance data of C, N, O, Na, Mg, Al, Ca, and Cr in Genesis silicon targets. For Na, Mg, Al, and Ca, data from three different SW regimes are also presented. Data were obtained by backside depth profiling using Secondary Ion Mass Spectrometry. The accuracy of these measurements exceeds those obtained by in-situ observations; therefore the Genesis data provide new insights into elemental fractionation between Sun and solar wind, including differences between solar wind regimes. We integrate previously published noble gas and hydrogen elemental abundances from Genesis targets, as well as preliminary values for K and Fe. The abundances of the solar wind elements measured display the well-known fractionation pattern that correlates with each element's First Ionization Potential (FIP). When normalized either to spectroscopic photospheric solar abundances or to those derived from CI-chondritic meteorites, the fractionation factors of low-FIP elements (K, Na, Al, Ca, Cr, Mg, Fe) are essentially identical within uncertainties, but the data are equally consistent with an increasing fractionation with decreasing FIP. The elements with higher FIPs between ~11 and ~16 eV (C, N, O, H, Ar, Kr, Xe) display a relatively well-defined trend of increasing fractionation with decreasing FIP, if normalized to modern 3D photospheric model abundances. Among the three Genesis regimes, the Fast SW displays the least elemental fractionation for almost all elements (including the noble gases) but differences are modest: for low-FIP elements the precisely measured Fast-Slow SW variations are less than 3%.

KW - Solar wind

KW - Solar abundances

KW - Fast solar wind

KW - Slow solar wind

KW - Solar coronal mass ejections

KW - Chemical abundances

U2 - 10.3847/1538-4357/abc94a

DO - 10.3847/1538-4357/abc94a

M3 - Article

VL - 907

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 15

ER -

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