Unidentified Molecular Bands in Comets

Details Unidentified Molecular Bands in Comets Unidentified Molecular Bands in Comets

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...185.6504w&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #65.04; Bulletin of the American Astronomical Society, Vol. 26, p.1418

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Scientific paper

Several moderately strong emission bands were discovered in the optical spectrum of comet Halley at 4930 Angstroms, 5300 Angstroms and 6000 Angstroms . These bands have been observed in three previous comets, and here we present evidence for the strongest band in another comet. The similar structure and simultaneous appearance of all three bands indicate that they arise from a single molecular species. The strongest unidentified band at 5300 Angstroms was observed in the spectrum of comet Nakamura-Nishamura-Macholtz (1994m) obtained in July 1994 with the Multiple Mirror Telescope using the red channel spectrograph. We present low resolution spectra together with evidence that the unidentified band is due to a molecular ion. We also demonstrate that no known laboratory spectra of likely diatomic or triatomic molecular ions match the unidentified molecular emission features observed in comets.

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