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Fabry-Perot observations of NH2 emission from Comet HalleyThe (0,8,0) cometary NH2 band lines have been isolated from both cometary and terrestrial OI 6300 A OH emissions in Fabry-Perot spectra of the emissions of Comet Halley near 6300 A. On the assumption that the major source of NH2 is NH3, these NH2 measurements limit NH3's abundance relative to H2O. The results thus obtained are noted to depend on the NH2 (0,8,0) band fluorescence efficiency factor g(B); using the g(B) value of A'Hearn (1982), the NH3 abundance is found to be about 0.1 percent of that of H2O, while the g(B) value of Tegler and Wyckoff (1989) yields a figure of 0.4 percent. Both results indicate a low NH3 abundance relative to water on Comet Halley.
Document ID
19900028273
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Magee-Sauer, K.
(Wisconsin Univ. Madison, WI, United States)
Scherb, F.
(Wisconsin Univ. Madison, WI, United States)
Roesler, F. L.
(Wisconsin Univ. Madison, WI, United States)
Harlander, J.
(Wisconsin, University Madison, United States)
Lutz, Barry L.
(Lowell Observatory Flagstaff, AZ, United States)
Date Acquired
August 14, 2013
Publication Date
November 1, 1989
Publication Information
Publication: Icarus
Volume: 82
ISSN: 0019-1035
Subject Category
Astrophysics
Accession Number
90A15328
Funding Number(s)
CONTRACT_GRANT: NAGW-1351
CONTRACT_GRANT: NAGW-695
Distribution Limits
Public
Copyright
Other

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