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Search for molecules in Comet Halley at millimeter wavelengths (1987)

Kinzel, Wayne M. ; Irvine, William M. ; Schloerb, F. Peter ; [et al.]

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Publication Date: 2019-07-27

Description: Data collected with the Five College Radio Astronomy Observatory 13.7-m radio telescope are used to search for the possible CN parent molecules HNC, HC3N, and CH3CN in Comet Halley at millimeter wavelengths. Maximum relative abundances for HNC/HCN of 0.3, for HC3N/HCN of 0.4, and for CH3CN/HCN of 0.8 are obtained, showing that these three molecules are not a major source of the CN radical observed in optical and UV spectroscopy. Upper limits to the beam averaged column densities and production rates of these molecules are determined (in addition to an upper limit for the beam averaged column density for the formyl ion of less than 10 to the 11th/sq cm), providing important constraints for chemical models of the coma.

Keywords: ASTROPHYSICS

Type: Cometary radio astronomy; Sept. 24-26, 1986; Green Bank, WV; United States

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