CCD observations of comet Tuttle 1980 XIII - The H2O(+) ionosphere

Details CCD observations of comet Tuttle 1980 XIII - The H2O(+) ionosphere CCD observations of comet Tuttle 1980 XIII - The H2O(+) ionosphere

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...293..609i&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 293, June 15, 1985, p. 609-615.

Astronomy and Astrophysics

Astrophysics

5

Atmospheric Moisture, Cometary Atmospheres, Comets, Ionospheres, Atmospheric Ionization, Charge Coupled Devices, Emission Spectra, Ionospheres, Comets, Observations, Tuttle, Ionosphere, Remote Sensing, Spectra, Ions, Water, Charge-Coupled Device, Brightness, Concentration, Photoionization, Production Rates, Theoretical Studies, Emissions, Comae

Scientific paper

A CCD spectrum of comet Tuttle 1980h has been analyzed with emphasis on the emission of H2O(+) ions. The fine angular resolution (1.5 arcsec) and the capability of absolute brightness calibration of the CCD instrument made it possible to determine the spatial concentration of the H2O(+) ions of this faint comet and the total number of these ions confined within a spherical region. Solar photoionization of the H2O atmosphere can account for the production of the H2O(+) ions observed in the confined region. The dimension of the H2O(+) ionosphere at the time of observation was found to be comparatively small, implying the possible existence of an ionopause sharply delineating the extension of the cometary ionosphere.

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