Infrared Spectroscopy of Comet Hale-Bopp |
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| Authors: | Weaver H A Brooke T Y Chin G Kim S J Bockelée-Morvan D Davies J K |
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| Institution: | (1) Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA;(2) Jet Propulsion Laboratory, Pasadena, CA 91109, USA;(3) NASA Goddard Space Flight Center, Planetary Systems Branch, Greenbelt, MD 20771, USA;(4) Institute of Natural Sciences, Kyunghee University, Yongin, Kyunggido, 449-701, Korea;(5) Observatoire de Meudon-Paris, F-92195 Meudon Cedex, France |
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| Abstract: | High resolution (λ/δλ ∼ 20,000) spectra of comet C/1995 O1 (Hale-Bopp) in the 2–5 μm region were obtained during UT 2–5 March
1997 using CSHELL at the NASA Infrared Telescope Facility (IRTF) on Mauna Kea. The heliocentric and geocentric distances of
the comet were ∼1.1 AU and ∼1.5 AU,respectively. We detected emission lines of the gas-phase molecules H2O, 4, C2H6, C2H2, HCN, and CO and derived absolute production rates and relative abundances for all species. We also used the 2-dimensional
nature of the CSHELL data to investigate the spatial distribution of the molecules and find evidence that CO was derived at
least partly from an extended source in the coma.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | Infrared spectroscopy composition comets |
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