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

Laming, J. Martin; Heber, V. S.; Burnett, D. S.; Guan, Yunbin; Hervig, R. L.; Huss, G. R.; Jurewicz, A. J. G.; Koeman-Shields, E. C.; McKeegan, Kevin D.; Nittler, L. R.; Reisenfeld, D. B.; Rieck, K. D.; Wang, Jingyuan; Wiens, R. C.; Woolum, D. S.

doi:10.3847/2041-8213/aa9bf0

Cited by 21 publications

(51 citation statements)

References 43 publications

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“…The isotopic fractionations of heavier isotopes Ne and Ar are well predicted, the lighter isotopes O, N predictions are slightly low, but the predicted He isotopic fractionation is currently opposite to that observed, likely because 3 He is subject to extra physics not included in the model (discussion Laming et al. ).…”

Section: Discussionmentioning

confidence: 91%

“…Laming et al. () constrained their model input parameters to best fit the currently available Genesis elemental and isotopic data. The elemental fractionation is predicted quite well, even in the early versions (e.g., Laming ; Laming et al.…”

Section: Discussionmentioning

confidence: 99%

“…Gray boxes are the predictions of Models 1 and 2 by Laming et al. (), while the vertical green line and the vertical yellow line are the ICD and CAI proxy models, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Laming et al. () presented a quantitative model demonstrating how isotopic and elemental (primarily FIP) fractionation in the SW may be related, driven by magnetohydrodynamic waves whose interactions vary spatially and cause the variations in the SW fractionation and velocity with the solar source region observed by spacecraft (detailed overview in Laming et al. ).…”

Section: Introductionmentioning

confidence: 99%

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Magnesium isotopes of the bulk solar wind from Genesis diamond‐like carbon films

Jurewicz

Rieck

Hervig

et al. 2020

Meteorit & Planetary Scien

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NASA's Genesis Mission returned solar wind (SW) to the Earth for analysis to derive the composition of the solar photosphere from solar material. SW analyses control the precision of the derived solar compositions, but their ultimate accuracy is limited by the theoretical or empirical models of fractionation due to SW formation. Mg isotopes are “ground truth” for these models since, except for CAIs, planetary materials have a uniform Mg isotopic composition (within ≤1‰) so any significant isotopic fractionation of SW Mg is primarily that of SW formation and subsequent acceleration through the corona. This study analyzed Mg isotopes in a bulk SW diamond‐like carbon (DLC) film on silicon collector returned by the Genesis Mission. A novel data reduction technique was required to account for variable ion yield and instrumental mass fractionation (IMF) in the DLC. The resulting SW Mg fractionation relative to the DSM‐3 laboratory standard was (−14.4‰, −30.2‰) ± (4.1‰, 5.5‰), where the uncertainty is 2ơ SE of the data combined with a 2.5‰ (total) error in the IMF determination. Two of the SW fractionation models considered generally agreed with our data. Their possible ramifications are discussed for O isotopes based on the CAI nebular composition of McKeegan et al. (2011).

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

“…Gray boxes are the predictions of Models 1 and 2 by Laming et al. (), while the vertical green line and the vertical yellow line are the ICD and CAI proxy models, respectively.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnesium isotopes of the bulk solar wind from Genesis diamond‐like carbon films

Jurewicz

Rieck

Hervig

et al. 2020

Meteorit & Planetary Scien

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“…However, coronal hole FIP models by Laming (e.g., Laming et al. ) predict that H/Mg is depleted to 0.46 of the Asplund et al. () photospheric abundances.…”

Section: Discussionmentioning

confidence: 98%

Hydrogen fluence in Genesis collectors: Implications for acceleration of solar wind and for solar metallicity

Huss

Koeman-Shields

Jurewicz

et al. 2019

Meteorit & Planetary Scien

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NASA's Genesis mission was flown to capture samples of the solar wind and return them to the Earth for measurement. The purpose of the mission was to determine the chemical and isotopic composition of the Sun with significantly better precision than known before. Abundance data are now available for noble gases, magnesium, sodium, calcium, potassium, aluminum, chromium, iron, and other elements. Here, we report abundance data for hydrogen in four solar wind regimes collected by the Genesis mission (bulk solar wind, interstream low‐energy wind, coronal hole high‐energy wind, and coronal mass ejections). The mission was not designed to collect hydrogen, and in order to measure it, we had to overcome a variety of technical problems, as described herein. The relative hydrogen fluences among the four regimes should be accurate to better than ±5–6%, and the absolute fluences should be accurate to ±10%. We use the data to investigate elemental fractionations due to the first ionization potential during acceleration of the solar wind. We also use our data, combined with regime data for neon and argon, to estimate the solar neon and argon abundances, elements that cannot be measured spectroscopically in the solar photosphere.

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Linking the Sun to the Heliosphere Using Composition Data and Modelling

et al. 2021

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Our understanding of the formation and evolution of the corona and the heliosphere is linked to our capability of properly interpret the data from remote sensing and in-situ observations. In this respect, being able to correctly connect in-situ observations with their source regions on the Sun is the key for solving this problem. In this work we aim at testing a diagnostics method for this connectivity.This paper makes use of a coronal jet observed on 2010 August 2nd in active region 11092 as a test for our connectivity method. This combines solar EUV and in-situ data together with magnetic field extrapolation, large scale MHD modeling and FIP (First Ionization Potential) bias modeling to provide a global picture from the source region of the jet to its possible signatures at 1AU.Our data analysis reveals the presence of outflow areas near the jet which are within open magnetic flux regions and which present FIP bias consistent with the FIP model results. In our picture, one of these open areas is the candidate jet source. Using a back-mapping technique we identified the arrival time of this solar plasma at the ACE spacecraft. The in-situ data show signatures of changes in the plasma and magnetic field parameters, with FIP bias consistent with the possible passage of the jet material.Our results highlight the importance of remote sensing and in-situ coordinated observations as a key to solve the connectivity problem. We discuss our results in view of the recent Solar Orbiter launch which is currently providing such unique data.

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

Cited by 21 publications

References 43 publications

Magnesium isotopes of the bulk solar wind from Genesis diamond‐like carbon films

Magnesium isotopes of the bulk solar wind from Genesis diamond‐like carbon films

Hydrogen fluence in Genesis collectors: Implications for acceleration of solar wind and for solar metallicity

Linking the Sun to the Heliosphere Using Composition Data and Modelling

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