Oxygen flux in the solar wind: Ulysses observations

被引：47

作者：

von Steiger, Rudolf ^{[1
]}

Zurbuchen, Thomas H. ^{[2
]}

McComas, David J. ^{[3
,4
]}

机构：

[1] Int Space Sci Inst, CH-3012 Bern, Switzerland

[2] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA

[3] SW Res Inst, Space Sci & Engn Div, San Antonio, TX 78228 USA

[4] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2010年 / 37卷

关键词：

ION COMPOSITION SPECTROMETER; CHEMICAL-COMPOSITION; ABUNDANCE; SUN; DISTRIBUTIONS; ELEMENTS; CYCLE;

D O I：

10.1029/2010GL045389

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We use the complete set of Ulysses solar wind data to conduct a comprehensive determination of the oxygen flux in relation to the proton flux in the solar wind during a wide range of solar activity levels. The data cover the heliosphere between 1.3 and 5.4 AU and, due to the unique orbit of Ulysses, all of the heliographic latitudes within +/- 80 degrees. We find log-normal distributions for O and H daily flux values, but with significant differences between slow and fast wind. Coronal hole-associated fast wind has a distribution that is approximately three times narrower than the one of slow wind associated with streamers. Finally, we derive the solar oxygen abundance, finding a value of 8.82 +/- 0.08, and discuss this value in comparison with the results of spectroscopic determinations. Citation: von Steiger, R., T. H. Zurbuchen, and D. J. McComas (2010), Oxygen flux in the solar wind: Ulysses observations, Geophys. Res. Lett., 37, L22101, doi:10.1029/2010GL045389.

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页数：5

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