HCN and CO Emission in comet C/1997 N1 (Tabur)

Astronomy and Astrophysics – Astronomy

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Scientific paper

Mm-wavelength spectra were obtained of HCN and CO using the NRAO 12-m telescope during 1996 Oct. The HCN J=1-0 transition at 89 GHz was detected on Oct 6-7 UT with an integrated line-flux area of 0.07 +/- 0.01 K km s(-1) , a FWHM linewidth of 1.5 +/- 0.2 km s(-1) , and the line center is not measurably shifted from the ephemeris velocity. The CO J=1-0 line was not detected down to a 3-sigma level of 0.04 K km s(-1) . We will present spectra and a production rate for HCN, and an upper limit to the CO production rate.

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