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AGU: Geophysical Research Letters

 

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  • Planetology: Comets and Small Bodies: Interactions with solar wind plasma and fields

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 13, NO. 4, PP. 415-418, 1986
doi:10.1029/GL013i004p00415

Three dimensional energetic ion bulk flows at comet P/Giacobini‐Zinner

I. G. Richardson

Blackett Laboratory, Imperial College

S. W. H. Cowley

Blackett Laboratory, Imperial College

R. J. Hynds

Blackett Laboratory, Imperial College

T. R. Sanderson

Space Science Department of ESA

K‐P. Wenzel

Space Science Department of ESA

P. W. Daly

Max‐Planck‐Institut für Aeronomie

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.

Received 14 February 1986; accepted 4 March 1986; .

Citation: Richardson, I. G., S. W. H. Cowley, R. J. Hynds, T. R. Sanderson, K‐P. Wenzel, and P. W. Daly (1986), Three dimensional energetic ion bulk flows at comet P/Giacobini‐Zinner, Geophys. Res. Lett., 13(4), 415–418, doi:10.1029/GL013i004p00415.

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