Abstract
Cyanogen (CN) jets were discovered in comet Halley by applying an image processing ring masking technique to ground-based observations1,2. We now report the detection of dust, C2, C3, CN and ([O I] + NH2) jet features in comet Halley during the period of the spacecraft Giotto encounter (13–18 March 1986). With absolute flux measurements, careful continuum subtraction and an improved ring-masking technique, we have achieved an unambiguous separation of the gas and dust components of the cometary coma emissions. A comparison of the morphologies of these gas and dust jets provides important information about the anisotropic dynamical processes in the cometary coma and on the surface of comet Halley's nucleus.
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Cosmovici, C., Schwarz, G., Ip, WH. et al. Gas and dust jets in the inner coma of comet Halley. Nature 332, 705–709 (1988). https://doi.org/10.1038/332705a0
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DOI: https://doi.org/10.1038/332705a0
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