High-resolution spectra of the 6300-A region of Comet P/Halley

Details High-resolution spectra of the 6300-A region of Comet P/Halley High-resolution spectra of the 6300-A region of Comet P/Halley

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...91..270c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 91, June 1991, p. 270-279.

Physics

8

Cometary Atmospheres, Halley'S Comet, Line Spectra, Spectral Resolution, Visible Spectrum, Airglow, Deuterium, Nitrogen Hydrides, Oxygen Spectra, Photodissociation

Scientific paper

Echelle/reticon high resolution spectra have been obtained for the 6300-A region of P/Halley which show a clear separation in the relative contributions of the various rotational lines of the (0,8,0) band of NH2 and of the cometary and airglow contributions of O(1D). An analysis of these data indicates that the vibrational structure of the band could be useful as a diagnostic for coma temperatures and/or outflow kinematics. The inner radial brightness distribution for O(1D) is found to be in keeping with production by H2O parent-molecule dissociation; O(1D) also exhibited a detectable deviation from circular symmetry.

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