Ultraviolet spectrophotometry of Comet Giacobini-Zinner during the ICE encounter

Details Ultraviolet spectrophotometry of Comet Giacobini-Zinner during the ICE encounter Ultraviolet spectrophotometry of Comet Giacobini-Zinner during the ICE encounter

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...69..329m&link_type=abstract

Icarus (ISSN 0019-1035), vol. 69, Feb. 1987, p. 329-337.

Astronomy and Astrophysics

Astronomy

21

Giacobini-Zinner Comet, Hydroxyl Emission, International Sun Earth Explorer 3, Spectrophotometry, Ultraviolet Astronomy, Abundance, Electron Plasma, Iue, Comets, Ultraviolet, Wavelengths, Spectrophotometry, Density, Spectra, Spacecraft Observations, Giacobini-Zinner, Ice Mission, Iue Satellite, Satellite Observations, Water, Production Rate, Abundance, Brightness, Molecules, Comparisons, Ion Composition Instrument, Ici, Electrons, Flux, Plasma Electron Experiment, Fluorescence

Scientific paper

The IUE's UV spectrophotometer was used to monitor Comet Giacobini-Zinner's H2O production rate from June to October, 1985, in support of the International Cometary Explorer (ICE) mission. Observation results for the spatial and temporal variation and the abundance or upper limits of C, CO, CO(+), CO2(+), CS, H, Mg(+), O, OH, and S, between September 9 and 12, included the time of the ICE encounter: at this time, the H2O production rate obtained was consistent with a number of gas production rates derived indirectly from the ICE experiments. A comparison of the CO2(+) ion abundance with the total electron density measured by the plasma electron and radio science experiments on ICE implies an ion deficiency relative to electrons, so that the satisfaction of charge balance criteria requires the presence of a major ion population not detected by remote sensing.

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