The near-nuclear coma of comet Halley in march 1986

Karoly Szegö, Jean François Crifo, Alexander V. Rodionov, Marco Fulle

Research output: Contribution to journalArticle

12 Citations (Scopus)


The cameras carried onboard the flyby missions to comet P/Halley in 1986 imaged the near nuclear jet activity from several spatial directions. The observed, very structured near nuclear dust jets were considered at that time as the result of dust emission from well localized active surface regions (without supporting 3-D model computations, however). Based on the first, recently developed 3-D gas dynamical model of P/Halley's activity, we have been shown that jet features can be reproduced assuming a homogeneous dusty ice nucleus surface. The dust in the collisional near nuclear coma is concentrated along the gas flow discontinuities resulting from the complicated surface orography, creating the visual impression of dust jets. We present here the results of these calculations for the near nucleus dust distributions, and we compare them with the direct observations made during the three Halley flybys (Vega 1, Vega 2, and Giotto).

Original languageEnglish
Pages (from-to)435-443
Number of pages9
JournalEarth, Moon and Planets
Issue number1-4
Publication statusPublished - Mar 1 2002


  • 3-D gas dynamics
  • Dust jets
  • P/Halley

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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