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

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/3714

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.
URI:	http://hdl.handle.net/2248/3714
ISSN:	0004-6280
Appears in Collections:	IIAP Publications

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