Abstract
Measurements made by the three-dimensional electron spectrometer of the RPA-Copernic experiment aboard the Giotto spacecraft give a preliminary description of the complex interaction between comet Halley and the solar wind. As Giotto approached the comet, it traversed several regions of differing plasma characteristics: a large (∼107 km) upstream region, a foreshock, a bow wave with its apex at ∼4×105 km, a transition region, a region permanently and strongly contaminated by cometary ions, a collisionopause at a sub-solar distance of ∼5−6×104 km, and various inner regions up to the inner coma, including a region of depleted hot plasma.
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References
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Rème, H., Sauvaud, J., d'Uston, C. et al. Comet Halley–solar wind interaction from electron measurements aboard Giotto. Nature 321 (Suppl 6067), 349–352 (1986). https://doi.org/10.1038/321349a0
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DOI: https://doi.org/10.1038/321349a0
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