Other
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..246s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 97, Jan. 1989, p. 246-253. Research supported by the Alfred P. Sloan Foundation.
Other
42
Chemical Composition, Cosmochemistry, Formaldehyde, Halley'S Comet, Radio Spectra, Molecular Spectra, Very Large Array (Vla), Comets, Halley, Radio Methods, Formaldehyde, Emissions, Comet Nuclei, Earth-Based Observations, Outgassing, Comae, Source, Iks Instrument, Production Rate, Comparisons, Calculations
Scientific paper
The J(K-1 K1) = -1(11) -10(10) transition of H2CO was detected in emission at 4829.659 MHz from Comet Halley. The H2CO emission line had a peak intensity of 2.66 + or - 0.78 mJy/beam with a small blueshift of -0.76 + or - 0.40 km/s, which is consistent with the anisotropic outgassing of the nucleus in the solar direction found for other cometary species. Data analysis suggests that cometary H2CO was produced from an extended source in the coma as well as directly from the nucleus and that it was not refrigerated as in interstellar dark nebulae. The derived H2CO production rate of 1.5 x 10 to the 28th molecules/s is obtained which is consistent with observational and theoretical findings.
de Pater Imke
Palmer Patrick
Snyder Lewis E.
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