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Science 13 March 1998:
Vol. 279. no. 5357, pp. 1707 - 1710
DOI: 10.1126/science.279.5357.1707
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Reports
Deuterium in Comet C/1995 O1 (Hale-Bopp): Detection of DCN
Roland Meier,
*
Tobias C. Owen,
*
David C. Jewitt,
*
Henry E. Matthews,
Matthew Senay,
*
Nicolas Biver,
Dominique Bockelée-Morvan,
Jacques Crovisier,
Daniel Gautier
Deuterated hydrogen cyanide (DCN) was detected in a comet, C/1995
O1 (Hale-Bopp), with the use of the James Clerk Maxwell Telescope on
Mauna Kea, Hawaii. The inferred deuterium/hydrogen (D/H) ratio in
hydrogen cyanide (HCN) is (D/H)HCN = (2.3 ± 0.4) × 10 3. This ratio is higher than the D/H ratio found in
cometary water and supports the interstellar origin of cometary ices.
The observed values of D/H in water and HCN imply a kinetic
temperature  30 ± 10 K in the fragment of interstellar
cloud that formed the solar system.
R. Meier, T. C. Owen, D. C. Jewitt, N. Biver, University
of Hawaii, Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI
96822, USA.
H. E. Matthews, National Research Council of Canada, Herzberg
Institute of Astrophysics, 5071 West Saanich Road, Victoria, BC V8X
4M6, Canada, and Joint Astronomy Centre, 660 North A'Ohoku Place,
Hilo, HI 96720, USA.
M. Senay, Five College Radio Astronomy Observatory, University of
Massachusetts, Amherst, MA 01003-4517, USA.
D. Bockelée-Morvan, J. Crovisier, D. Gautier, Observatoire de
Paris-Meudon, 5 Place Jules Janssen, F-92195 Meudon, Cedex, France.
*
Visiting astronomer at the James Clerk Maxwell Telescope, 600 North A'Ohoku Place, Hilo, HI 96720, USA.
To whom correspondence should be addressed: E-mail:
meier{at}uhifa.ifa.hawaii.edu
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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
- The Spin Temperature of NH3 in Comet C/1999S4 (LINEAR).
- H. Kawakita, J.-i. Watanabe, H. Ando, W. Aoki, T. Fuse, S. Honda, H. Izumiura, T. Kajino, E. Kambe, S. Kawanomoto, et al. (2001)
Science
294, 1089-1091
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