DPS 2001 meeting, November 2001
Session 20. Comet Posters
Displayed, 9:00am Tuesday - 3:00pm Saturday, Highlighted, Wednesday, November 28, 2001, 10:30am-12:30pm, French Market Exhibit Hall

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[20.13] A Spectral ATLAS of comet 122P/de Vico: A Tapestry of Linelists And Spectra

A. L. Cochran, W. D. Cochran (Univ. of Texas)

On 3 and 4 October, 1995, we obtained high spectral resolving power (R=\lambda/\Delta\lambda = 60,000) observations of comet 122P/de~Vico using the 2DCoude cross-dispersed echelle spectrograph on the 2.7-m telescope of McDonald Observatory. The spectra cover the wavelength range from 3830Å--10192Å. The spectra from 3830--5776Å\ are continuous; from 5777--10192Å\ there are increasing interorder gaps. The comet was at a heliocentric distance of 0.66\,{\sc au} and a geocentric distance of 1.0\,{\sc au}. Comet de~Vico has a very high gas-to-dust ratio and the spectra have excellent signal/noise. These two factors combined to yield spectra with a large number of emission lines. We have collected laboratory molecular line lists and have used these line lists in order to identify as many of the detected lines as possible. We have identified 12,358 emission lines and have located another 4095 lines which we cannot identify. We will present representative spectra and identifications along with a description of our plans to make these spectra and identifications available to the community. This atlas should prove a valuable tool for future studies of comets.

This work was supported by NASA Grant NAG5-9003.

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