Isotropic spectra of pickup ions from New Horizons/SWAP at 11 and 17 AU

Details Isotropic spectra of pickup ions from New Horizons/SWAP at 11 and 17 AU Isotropic spectra of pickup ions from New Horizons/SWAP at 11 and 17 AU

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh11c..05r&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH11C-05

Physics

Plasma Physics

[7837] Space Plasma Physics / Neutral Particles, [7894] Space Plasma Physics / Instruments And Techniques

Scientific paper

As the spacecraft New Horizons journeys to Pluto and beyond, the Solar Wind Around Pluto instrument (SWAP) makes high-quality measurements of interstellar pick-up ions (PUI) and the solar wind. We report on new observations of PUIs at an unprecedented heliocentric distance of 17 AU. We find that a simple, isotropic PUI distribution function fits the data remarkably well. We use the same isotropic PUI model to fit the spectrum measured at 11 AU with the addition of a solar wind distribution function. We fit the spectra by convolving the model distributions with the full response of SWAP, which we found through extensive calibration of the SWAP flight spare. Hence, such a forward-modeling approach including an instrument's detailed response might be necessary for the correct interpretation of other space data.

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