TKS-Vega experiment - NH and NH2 bands in Comet Halley

Journal Article · Wed May 01 04:00:00 EDT 1991 · Astronomical Journal; (United States)

DOI:https://doi.org/10.1086/115816· OSTI ID:5515462

Krasnopol'skii, V A; Tkachuk, A IU ^[1]

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1. AN SSSR, Institut Kosmicheskikh Issledovanii, Moscow (USSR)

An analysis is conducted of the March 9, 1986 distribution of the NH 336-nm band and the NH2 bands in the 580-700 nm region on Comet Halley. Of all candidates considered, only ammonia suggests itself as a parent of both NH2 and NH. The ammonia production rate is obtained from measurements of NH2 bands by dividing the observed Q(NH2) by 0.92, which is the yield of NH2 in NH3 photolysis. The NH3 presently measured is an order of magnitude lower than that derived from the Giotto IMS data. 28 refs.

• OSTI ID: 5515462
• Journal Information: Astronomical Journal; (United States), Journal Name: Astronomical Journal; (United States) Vol. 101; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640107* -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
AMMONIA
CHEMICAL COMPOSITION
CHEMICAL REACTION YIELD
CHEMISTRY
COMETS
COSMOCHEMISTRY
ELEMENT ABUNDANCE
EMISSION SPECTRA
HALLEY COMET
HYDRIDES
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
SPACE VEHICLES
SPECTRA
VEGA SPACE PROBES
VEHICLES
YIELDS