One-micron CN observations of Comet Halley

Details One-micron CN observations of Comet Halley One-micron CN observations of Comet Halley

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99.1099r&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, Oct. 1987, p. 1099-1101.

Astronomy and Astrophysics

Astronomy

Astronomical Spectroscopy, Comet Nuclei, Halley'S Comet, Line Spectra, Infrared Spectroscopy, Signal To Noise Ratios, Comets, Halley, Cn Radical, Spectra, Wavelengths, Comet Nuclei, Comae, Composition, Chemistry, Earth-Based Observations, Telescope Methods, Emissions, Flux, Analysis, Procedure

Scientific paper

Three spectra of Comet Halley in the 0.86 to 1.37-micron wavelength region have been obtained. On December 4, 1985, the 0-0, 1-1, 1-0, and 2-1 transitions of the red system of CN were detected using a 13 arcsec aperture centered on the nucleus of the comet. The 0-0 and 1-1 transitions were also observed in the coma at positions 20 arcsec from the nucleus. A line to continuum ratio of 0.25 was observed for the 0-0 transition at the position of the nucleus of the comet. A ratio of 1.5 was observed at the off-nucleus positions. On April 28, 1986, an upper limit to the strength of the 0-0 transition was obtained.

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