Results 231 to 240 of about 6,299 (262)
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Solar wind heavy ion abundances
Solar Physics, 1975During periods in 1969–1971 when interplanetary flow conditions were quiet, 17 determinations of the solar wind Fe and Si abundances and 7 of the O abundance were made. On the average 〈N(Fe)/N(H)〉 = 5.3 × 10-5, 〈N(Si)/N(H)〉 = 7.6 × 10-5 and 〈N(O)/N(H)〉 = 5.2 × 10-4. Variations from the averages over a total range of factors of ∼4 for O, ∼4 for Si, and ∼
S. J. Bame +4 more
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Solar Physics, 1972
From 13 scans obtained with a double-band pass spectrograph at the Snow telescope at Mount Wilson, interpreted by the method of spectral synthesis, the abundance of gold turns out to be log [N(Au)/N(H)] + 12 = 0.70, assuming loggf = − 0.57.
John E. Ross, Lawrence H. Aller
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From 13 scans obtained with a double-band pass spectrograph at the Snow telescope at Mount Wilson, interpreted by the method of spectral synthesis, the abundance of gold turns out to be log [N(Au)/N(H)] + 12 = 0.70, assuming loggf = − 0.57.
John E. Ross, Lawrence H. Aller
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Solar Physics, 1972
Low noise, high resolution spectral scans have been obtained for the resonance lines of silver λ3280.7 and λ3382.9, observed at the centre of the solar disk. A double pass-monochromator is used in conjunction with the Snow telescope at Mount Wilson; the transparency of the sky is monitored during the observations in order to achieve required accuracy ...
John E. Ross, Lawrence H. Aller
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Low noise, high resolution spectral scans have been obtained for the resonance lines of silver λ3280.7 and λ3382.9, observed at the centre of the solar disk. A double pass-monochromator is used in conjunction with the Snow telescope at Mount Wilson; the transparency of the sky is monitored during the observations in order to achieve required accuracy ...
John E. Ross, Lawrence H. Aller
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Oxygen Abundances in Solar-Type Stars
Astrophysics and Space Science, 1999The absolute solar oxygen abundance, log e⨀ = 8.80 ± 0.06, has been determined from various oxygen abundance indicators in different solar atlases, and a new method is proposed to test collision rate coefficients for the NLTE model of O i. Using effective temperatures derived from Balmer lines, oxygen abundances from O i 7773 triplets in 83 solar-type ...
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Abundances in the solar corona
Advances in Space Research, 1997Abstract A large number of papers over the past 15 years have commented on solar coronal abundances and how they differ from photospheric values. The simple pattern of enhancement or depletion with element first ionization potential (FIP) has been called into question by recent data, however.
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Molecular engineering of contact interfaces for high-performance perovskite solar cells
Nature Reviews Materials, 2022Furkan H Isikgor +2 more
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Stability challenges for the commercialization of perovskite–silicon tandem solar cells
Nature Reviews Materials, 2023Leiping Duan, Kylie R Catchpole
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