Far-ultraviolet spectral images of comet Halley from sounding rockets

Details Far-ultraviolet spectral images of comet Halley from sounding rockets Far-ultraviolet spectral images of comet Halley from sounding rockets

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.324..439m&link_type=abstract

Nature (ISSN 0028-0836), vol. 324, Dec. 4, 1986, p. 439-441.

Computer Science

Sound

18

Halley'S Comet, Hydrogen, Ion Production Rates, Rocket Sounding, Ultraviolet Spectra, Carbon, Far Ultraviolet Radiation, Photodissociation, Sulfur

Scientific paper

The authors present far-ultraviolet images of comet Halley obtained from sounding rockets launched on 24 February and 13 March 1986. The authors gained direct electrographic images of the hydrogen coma of the comet at the Lyman-α wavelength (1,216 Å), and objective spectra containing images of the coma at the oxygen (1,304 Å), carbon (1,561 and 1,657 Å) and sulphur (1,814 Å) resonance multiplets. Analysis of the Lyman-α images yields hydrogen atom production rates of 1.9×1030s-1 and 1.4×1030s-1 for the two observations. Images of oxygen, carbon and sulphur emissions obtained with the objective grating spectrograph are presented for the first set of observations and preliminary production rates are derived for these elements.

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