Variability of Pickup Ions and Possible Correlations with the Solar Wind from New Horizons/SWAP around 11 AU

Details Variability of Pickup Ions and Possible Correlations with the Solar Wind from New Horizons/SWAP around 11 AU Variability of Pickup Ions and Possible Correlations with the Solar Wind from New Horizons/SWAP around 11 AU

Publishing date

Dec 2009

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh13b1522r&link_type=abstract

Journals

American Geophysical Union, Fall Meeting 2009, abstract #SH13B-1522

Science

Physics

Field

Plasma Physics

Additional info 3

[2126] Interplanetary Physics / Heliosphere/Interstellar Medium Interactions, [2152] Interplanetary Physics / Pickup Ions, [2164] Interplanetary Physics / Solar Wind Plasma, [7859] Space Plasma Physics / Transport Processes

Type

Scientific paper

Abstract

The Solar Wind Around Pluto (SWAP) instrument aboard the NASA New Horizons spacecraft measured ions from ~11.2 to ~11.8 AU in the ecliptic plane in late 2008. We analyze about 25 one day (nominally) integrations of the combined distribution function of these ions from ~20 eV/e to 7.5 keV/e. In conjunction with these histograms, we report statistics on pseudo-moments computed for each hour. This auxiliary data provides a measure of the variability of the solar wind during the integration time of the histograms. Initial results indicate that the variability in the bulk speed appears to widen the histogram distribution, which artificially increases temperatures estimated from the histograms. In general, the pickup ions appear to be highly organized by the bulk solar wind speed, consistent with previous reports; however, there is a great deal of variability between these histograms. We intend to search for factors that will order this variability such as stream structure in the solar wind.

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