TY - JOUR
T1 - Hydrogen fluence in Genesis collectors
T2 - Implications for acceleration of solar wind and for solar metallicity
AU - Huss, Gary R.
AU - Koeman-Shields, Elizabeth
AU - Jurewicz, Amy J.G.
AU - Burnett, Donald S.
AU - Nagashima, Kazuhide
AU - Ogliore, Ryan
AU - Olinger, Chad T.
N1 - Funding Information:
We thank the Genesis curatorial facility at JSC for working with us to get the right samples for this work. The paper benefited from a thoughtful review by Martin Laming. Supported by NASA grants NNX09AC32G, NNX14AF25G, and NNX17AE73G to G.R.H. and NNX09AC35G, NNX14AF26G, and 80NSSC17K0025 to D.S.B.
Publisher Copyright:
© The Meteoritical Society, 2019.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - 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.
AB - 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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U2 - 10.1111/maps.13420
DO - 10.1111/maps.13420
M3 - Article
AN - SCOPUS:85076755745
SN - 1086-9379
VL - 55
SP - 326
EP - 351
JO - Meteoritics and Planetary Science
JF - Meteoritics and Planetary Science
IS - 2
ER -