A comparison between VEGA 1, 2 and Giotto flybys of comet 1P/Halley

Implications for Rosetta

M. Volwerk, M. Delva, D. Schmid, C. Koenders, I. Richter, K. Szegö

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Three flybys of comet 1P/Halley, by VEGA 1, 2 and Giotto, are investigated with respect to the occurrence of mirror mode waves in the cometosheath and field line draping in the magnetic pile-up region around the nucleus. The time interval covered by these flybys is approximately 8 days, which is also the approximate length of an orbit or flyby of Rosetta around comet 67P/Churyumov-Gerasimenko. Thus any significant changes observed around Halley are changes that might occur for Rosetta during one pass of 67P/CG. It is found that the occurrence of mirror mode waves in the cometosheath is strongly influenced by the dynamical pressure of the solar wind and the outgassing rate of the comet. Field line draping happens in the magnetic pile-up region. Changes in nested draping regions (i.e. regions with different Bx directions) can occur within a few days, possibly influenced by changes in the outgassing rate of the comet and thereby the conductivity of the cometary ionosphere.

Original languageEnglish
Pages (from-to)1441-1453
Number of pages13
JournalAnnales Geophysicae
Volume32
Issue number11
DOIs
Publication statusPublished - Nov 28 2014

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Halley's comet
comets
comet
outgassing
piles
occurrences
mirrors
pile
ionospheres
solar wind
intervals
orbits
ionosphere
conductivity
nuclei
comparison
rate

ASJC Scopus subject areas

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

Cite this

A comparison between VEGA 1, 2 and Giotto flybys of comet 1P/Halley : Implications for Rosetta. / Volwerk, M.; Delva, M.; Schmid, D.; Koenders, C.; Richter, I.; Szegö, K.

In: Annales Geophysicae, Vol. 32, No. 11, 28.11.2014, p. 1441-1453.

Research output: Contribution to journalArticle

Volwerk, M. ; Delva, M. ; Schmid, D. ; Koenders, C. ; Richter, I. ; Szegö, K. / A comparison between VEGA 1, 2 and Giotto flybys of comet 1P/Halley : Implications for Rosetta. In: Annales Geophysicae. 2014 ; Vol. 32, No. 11. pp. 1441-1453.
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