Fabry-Perot observations of Comet Halley H2O(+)

Details Fabry-Perot observations of Comet Halley H2O(+) Fabry-Perot observations of Comet Halley H2O(+)

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...86..172s&link_type=abstract

Icarus (ISSN 0019-1035), vol. 86, July 1990, p. 172-188. Research supported by the University of Wisconsin and National Solar Ob

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Fabry-Perot Spectrometers, Halley'S Comet, Positive Ions, Water Vapor, Comet Heads, Doppler Effect, Magnetohydrodynamic Flow, Plasma Acceleration, Spin, Comets, Halley, Water, Spectra, Ions, Water Vapor, Emissions, Flow, Spectrometry, Earth-Based Observations, Plasma, Velocity, Acceleration, Kinematics, Data, Comet Tails, Disconnection

Scientific paper

Fabry-Perot scanning spectrometer observations of Comet Halley's H2O(+) emissions have yielded 6158.64 and 6158.85 A spin doublet data at distances in the range of 0 to 2 million km from the comet heat in the antisunward direction. Cometary plasma outflow velocities were ascertained on the basis of the emissions' Doppler shifts, yielding results that were mostly but not exclusively consistent with the plasma's constant antisunward acceleration; the acceleration varied from night to night of observations over a 30-300 cm/sec range. The unusual plasma kinematics of December 14-15, 1985, and January 10, 1986, may be associated with the tail-disconnection activity observed by others.

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