Observations of formaldehyde in Comet Machholtz (1988j)

Details Observations of formaldehyde in Comet Machholtz (1988j) Observations of formaldehyde in Comet Machholtz (1988j)

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...86..289s&link_type=abstract

Icarus (ISSN 0019-1035), vol. 86, July 1990, p. 289-298. Research supported by the Alfred P. Sloan Foundation.

Computer Science

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Comets, Formaldehyde, Light Emission, Very Large Array (Vla), Comet Nuclei, Halley'S Comet, Outgassing, Comets, Machholz, 1988J, Formaldehyde, Composition, Emissions, Spectra, Comet Nuclei, Outgassing, Halley, Comparisons, Production Rate, Infrared, Diagrams, Earth-Based Observations, Parameters, Wavelengths, Radiowave Methods

Scientific paper

Comet Machholtz's 1(11)-1(10) formaldehyde emission was detected with the VLA in September, 1988 at 6-cm wavelength; the small blueshift of -0.76 + or - 0.40 km/sec noted by these observations is consistent with an anisotropic outgassing of the cometary nucleus in the solar direction. The derived formaldehyde production rate for Comet Halley, which exhibits a similar emission line blueshift, was 1.5 x 10 to the 28th mol/sec, while for Comet Machholtz the production rate is about an order of magnitude higher, at 2 x 10 to the 29th mol/sec. The fading of Comet Machholtz after these observations is ascribed to its breakup.

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