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Title: High-resolution studies of forbidden O I and NH2 line emissions at 6300 A in Halley's comet
Authors: Prasad, C. D
Chandrasekhar, T
Desai, J. N
Ashok, N. M
Sivaraman, K. R
Rajmohan, R
Keywords: Amines;Emission Spectra;Halley's Comet;Line Shape;Oxygen Spectra;Astronomical Spectroscopy;H Alpha Line
Issue Date: Jun-1988
Publisher: Astronomical Society of the Pacific
Citation: Publications of the Astronomical Society of the Pacific, Vol. 100, No. 628, pp. 702 - 709
Abstract: 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.
ISSN: 0004-6280
Appears in Collections:IIAP Publications

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