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| Titel |
A comparison between VEGA 1, 2 and Giotto flybys of comet 1P/Halley: implications for Rosetta |
| VerfasserIn |
M. Volwerk, K.-H. Glassmeier, M. Delva, D. Schmid, C. Koenders, I. Richter, K. Szego |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 32, no. 11 ; Nr. 32, no. 11 (2014-11-28), S.1441-1453 |
| Datensatznummer |
250121134
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| Publikation (Nr.) |
 copernicus.org/angeo-32-1441-2014.pdf |
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| Zusammenfassung |
| 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. |
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