High-resolution studies of forbidden O I and NH2 line emissions at 6300 A in Halley's comet

Details High-resolution studies of forbidden O I and NH2 line emissions at 6300 A in Halley's comet High-resolution studies of forbidden O I and NH2 line emissions at 6300 A in Halley's comet

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100..702p&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, June 1988, p. 702-709. Research supported by the D

Astronomy and Astrophysics

Astronomy

2

Amines, Emission Spectra, Halley'S Comet, Line Shape, Oxygen Spectra, Astronomical Spectroscopy, H Alpha Line

Scientific paper

The forbidden O I line and NH2 (0-8-0) emissions of Comet Halley at about 6300 A were observed during April 1986 using a Fabry-Perot spectrometer with a resolution of about 0.14 A. The forbidden O I line and NH2 rotational lines were spectrally well separated by the interferometer and a NH2/O I ratio of about 0.5 was found. The profile analysis shows the profiles of forbidden O I line and NH2 to be symmetric with linewidths of about 3.5-3 km/s. The cometary Balmer emission of hydrogen at 6563 A was barely detectable. An upper limit for H(alpha) based on the instrumental sensitivity yields a value of 30 Rayleighs.

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