High resolution spectroscopy of comet C/2002 C1 Ikeya-Zhang with SARG at TNG

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Comets: Spectroscopy, High-Resolution

Scientific paper

A program of high resolution spectroscopy of comets is being conducted at TNG in Canary Islands using the echelle spectrograph SARG. The aim of the program is to catalogue known and unknown emission lines, compare them with the lines already listed in existing catalogues and possibly identify unknown lines. In the visible range of the spectrum emission lines of daughter molecules and ions can be found, and many of them are still unidentified. The comet C/2002 C1 Ikeya-Zhang was observed with SARG during the night 19-20 of April and spectra with two different setups were taken. In the first case a narrow band filter was used to isolate the sodium emissions with a long slit and R = 43000. The data show very interesting cometary sodium emissions in the coma. The second setup used a short slit covering the spectral range of 4620-7920 Å with R = 57000.

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