Oxygen Flux in the Solar Wind: Ulysses Observations

Details Oxygen Flux in the Solar Wind: Ulysses Observations Oxygen Flux in the Solar Wind: Ulysses Observations

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh33c..01v&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH33C-01

Astronomy and Astrophysics

Astrophysics

[2100] Interplanetary Physics, [2164] Interplanetary Physics / Solar Wind Plasma, [2169] Interplanetary Physics / Solar Wind Sources, [7500] Solar Physics, Astrophysics, And Astronomy

Scientific paper

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°. 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 H/O=1500±300, and discuss this value in comparison with the results of spectroscopic determinations.

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