Spectroscopy of emission features near 3 microns in comet Wilson (1986l)

Details Spectroscopy of emission features near 3 microns in comet Wilson (1986l) Spectroscopy of emission features near 3 microns in comet Wilson (1986l)

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..971b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 15, 1989, p. 971-978.

Astronomy and Astrophysics

Astronomy

24

Abundance, Astronomical Spectroscopy, Comets, Emission Spectra, Halley'S Comet, Infrared Astronomy, Chemical Composition, Formaldehyde, Infrared Spectroscopy, Organic Compounds, Comets, Wilson, Spectroscopy, Emissions, Spectra, Abundance, Comparisons, Organic Material, Fluorescence, Formaldehyde, Infrared, Wavelengths, Earth-Based Observations, Spectra, Flux, Polyoxymethylene, Halley, Comae, Source, Residue, Irradiation

Scientific paper

Emission from C-H groups at 3.4 microns and an emission feature at 2.8 microns were detected in comet Wilson (1986l). A high-resolution spectrum confirms features at 3.52 microns. There is a possible emission feature at 3.04 microns. The spectra are strikingly similar to those of comet Halley. Derived abundances of the organic compounds are comparable. A model of the fluorescence spectrum of formaldehyde does not match the structure longward of 3.5 microns. The polymerized form of formaldehyde, polyoxymethylene, is a possible contributor to the 3.4-micron emission. The similarity between the 3.4-micron emission in a dynamically old (Halley) and a new (Wilson) comet suggests that these organics were incorporated into comets at the time of their formation.

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