O I concentration in Comet Halley

Details O I concentration in Comet Halley O I concentration in Comet Halley

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...82...61s&link_type=abstract

Icarus (ISSN 0019-1035), vol. 82, Nov. 1989, p. 61-66.

Astronomy and Astrophysics

Astronomy

2

Astronomical Spectroscopy, Comet Nuclei, Halley'S Comet, Oxygen Spectra, Visible Spectrum, Emission Spectra, Line Spectra, Luminous Intensity, Night Sky, Radial Distribution

Scientific paper

The present 200-mA spectral resolution and 1-inch spatial resolution long-slit spectra centered on Comet Halley's nucleus show an emission feature at the 5577 A wavelength of the green O I line whose spatial variation is very similar to that of the O I 6300-A line, but not the C2 bandhead nearby. On the assumption that the cometary O I 5577 A feature should share the cometary O I 6300-A line's spatial distribution, the 5577-A feature becomes at least partly attributable to oxygen; the ratio of the 6300-A line to the 5577-A line is then of the order of 10:1, which is consistent with the Festou and Feldman (1981) model in which water is the parent for the O I concentration features.

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