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  • 1985-1989  (1)
  • 1987  (1)
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    Observations of Comet Halley at H-alpha and 6300 A (1987)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: High spectral resolution measurements of Comet Halley at H-alpha and OD-1 were obtained in March, 1986 using a small aperture telescope with the Fabry-Perot interferometer at the Arecibo Observatory. It is suggested that the highly structured spectral signature observed at H-alpha is due to collimation of atomic hydrogen in the inner hydrogen corona, following photodissociation of parent species, and that the emission is due to resonance fluorescence of solar Lyman-beta radiation. A feature at 6300.8 A accompanying the OD-1 emission at 6300.3 A is attributed to NH2. For a 6-arcmin field of view, a brightness for the OD-1 emission of 260 + or - 50 rayleighs is found for both March 15 and 17.
    Keywords: ASTROPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 14; 53-56
    Format: text
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