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Optical spectrophotometry of Comet P/Giacobini-Zinner and emission profiles of H2O+Two-dimensional CCD spectrograms were obtained of Comet P/Giacobini-Zinner (1984e) on five occasions between July and October 1985. Spatial emission profiles of H2O+ were extracted at 6198 angstroms (the strongest ionic line in the visible spectrum). This emission line traces the extent of the ion, or plasma, tail. The spectrographic slit was placed approximately along the trajectory of the ICE spacecraft on September 11, 1985; the resulting H2O+ profile has a full-width-half-maximum of about 5700 km, about three times that of the plasma density profile measured by ICE, and has a full-width-zero-intensity of about 30,000 km, very similar to the ICE values. H2O production rates for the comet are derived and compared with those of Comet P/Halley (1982i).
Document ID
19860052877
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Strauss, M. A.
(California Univ. Berkeley, CA, United States)
Mccarthy, P. J.
(California Univ. Berkeley, CA, United States)
Spinrad, H.
(California, University Berkeley, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1986
Publication Information
Publication: Geophysical Research Letters
Volume: 13
ISSN: 0094-8276
Subject Category
Astrophysics
Accession Number
86A37615
Funding Number(s)
CONTRACT_GRANT: NAGW-270
Distribution Limits
Public
Copyright
Other

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