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The foreshock region upstream from the Comet Halley bow shockA few hours prior to the crossing of the Comet Halley bow shock, the Giotto spacecraft intermittently encountered an electron foreshock region. The electron foreshock is characterized by magnetic connection to the cometary bow shock and increased field aligned electron heat flux directed away from the bow shock. A similar region was intermittently encountered by the ICE spacecraft prior to its crossing of the Giacobini-Zinner bow wave. During periods of magnetic connection with the Halley bow shock, enhanced magnetic field fluctuations were observed. These enhancements are interpreted as indirect evidence of an ion foreshock in the electron foreshock. No clearly identifiable backstreaming protons are observed during these periods of magnetic connection, however, because it may be difficult to separate a backstreaming population from the cometary pick-up proton population already present in the upstream region.
Document ID
19880012509
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Fuselier, S. A.
(Lockheed Missiles and Space Co. Palo Alto, CA., United States)
Anderson, K. A.
(California Univ. Berkeley., United States)
Balsiger, H.
(Bern Univ. (Switzerland), United States)
Glassmeier, K. H.
(Cologne Univ. (Germany, F.R.), United States)
Goldstein, B. E.
(Jet Propulsion Lab. California Inst. of Tech., Pasadena., United States)
Neugebauer, M.
(Jet Propulsion Lab. California Inst. of Tech., Pasadena., United States)
Rosenbauer, H.
(Max-Planck-Inst. fuer Aeronomie Katlenburg-Lindau (Germany, F.R.), United States)
Shelley, E. G.
(Lockheed Aircraft Corp. Palo Alto, Calif., United States)
Date Acquired
September 5, 2013
Publication Date
September 1, 1987
Publication Information
Publication: ESA, Proceedings of the International Symposium on the Diversity and Similarity of Comets
Subject Category
Lunar And Planetary Exploration
Accession Number
88N21893
Funding Number(s)
CONTRACT_GRANT: NASW-3729
Distribution Limits
Public
Copyright
Other

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