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The ionospheric extent of P/Halley from ground based operations during the 1985-1986 apparitionSpatial profiles of H2O(+) emission in the inner coma of P/Halley on 8 dates during the 1985 to 1986 apparition are presented. The profiles are derived from two dimensional CCD spectrograms taken with the spectrograph slit oriented along the cometary radius vector. The observations cover the range from 16 Oct. 1985 (r = 2.14 AU preperihelion) to 6 June 1986 (r = 2.14 AU postperihelion). The surface brightness profile of the 6198A H2O(+) emission line is calibrated in terms of the column density of H2O(+) ions. The profile from 14.4 Mar. 1986 is compared with the Giotto Ion Composition Experiment measurement of the shape of the H2O(+) space density profile. The ionosphere becomes larger and steeper in the sunward direction with an increasing water production rate.
Document ID
19870017299
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Mccarthy, Patrick J.
(California Univ. Berkeley, CA, United States)
Strauss, Michael A.
(California Univ. Berkeley, CA, United States)
Spinrad, Hyron
(California Univ. Berkeley, CA, United States)
Date Acquired
September 5, 2013
Publication Date
December 1, 1986
Publication Information
Publication: ESA, Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 3: Posters
Subject Category
Astrophysics
Accession Number
87N26732
Funding Number(s)
CONTRACT_GRANT: NAGW-270
Distribution Limits
Public
Copyright
Other

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