Gas and dust jets in the inner coma of comet Halley

Cristiano B. Cosmovici, Gottfried Schwarz, Wing Huen Ip, Peter Mack

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


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.

Original languageEnglish
Pages (from-to)705-709
Number of pages5
Issue number6166
StatePublished - 1988


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