Abstract
Using energetic ion data obtained by the EPAS experiment on the ICE spacecraft we investigate the three dimensional ion bulk flow in the mass loading region around the comet P/Giacobini‐Zinner. We find relatively abrupt changes in flow speed (∼ 100 km s−1) at the boundaries between the pickup and mass loading regions. Flow deflections away from the comet tail of ∼15° are observed at the boundaries with peaks upto ∼30° inside the mass loading region. Ion energies of ∼300 keV are found inside the mass loading region which suggest the need to consider other ion acceleration mechanisms in addition to solar wind pickup.
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