A search for parent molecules at millimeter wavelengths in Comets P/Giacobini-Zinner 1984e and P/Halley 1982i

Details A search for parent molecules at millimeter wavelengths in Comets P/Giacobini-Zinner 1984e and P/Halley 1982i A search for parent molecules at millimeter wavelengths in Comets P/Giacobini-Zinner 1984e and P/Halley 1982i

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250a.365b&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 1: Plasma and Gas p 365-367 (SEE N87

Astronomy and Astrophysics

Astronomy

7

Astronomical Spectroscopy, Giacobini-Zinner Comet, Halley'S Comet, Millimeter Waves, Molecular Spectroscopy, Chemical Composition, Gas Expansion, Hydrocyanic Acid, Radio Astronomy

Scientific paper

The authors searched for the rotational lines of several potential parent molecules in comets P/Giacobini-Zinner 1984e and P/Halley 1982i with the IRAM 30-m radio telescope. The J = 1→0 lines of HCN were unambiguously detected in P/Halley in November-December 1985 and February 1986. Upper limits were obtained for HCN in P/Giacobini-Zinner, and for HC3N, CH3CN, OCS and CO in P/Halley. The average HCN production rates for P/Halley were 0.72×1026s-1 in Nov. - Dec. 1985 and 3.3×1027s-1 in Feb. 1986. The line profiles suggest a gas expansion velocity of 0.8 km s-1 in Nov. - Dec. (at rh = 1.5 AU) and 1.3 km s-1 in Feb. (at rh = 0.6 AU).

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