Optical spectrophotometry of Comet P/Giacobini-Zinner and emission profiles of H2O+

Details Optical spectrophotometry of Comet P/Giacobini-Zinner and emission profiles of H2O+ Optical spectrophotometry of Comet P/Giacobini-Zinner and emission profiles of H2O+

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..389s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, April 1986, p. 389-392.

Astronomy and Astrophysics

Astronomy

16

Astronomical Photometry, Comet Tails, Emission Spectra, Giacobini-Zinner Comet, Optical Measurement, Water Vapor, Molecular Ions, Molecular Spectroscopy, Positive Ions, Spectrophotometry, Comets, Giacobini-Zinner, Spectrophotometry, Emissions, Water, Spectra, Visible Light, Ions, Plasma, Comet Tails, Earth-Based Observations, Telescope Methods, Density, Comparisons, Production Rate

Scientific paper

The authors have obtained two-dimensional CCD spectrograms of comet P/Giacobini-Zinner (1984e) on five occasions between July and October 1985. They extracted spatial emission profiles of H2O+ at 6198 Å, the strongest ionic line in the visible spectrum. The authors placed the spectrograph slit approximately along the trajectory of the International Cometary Explorer (ICE) on 11 Sept. 1985; the resulting H2O+ profile has a full-width-half-maximum of ≈5700 km, about three times that of the plasma density profile measured by ICE, and has a full-width-zero-intensity of ≈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).

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