AI Article Synopsis
- - Comets contain a lot of volatile materials, with about 80% being water molecules, and scientists are working to identify other volatile compounds present.
- - The infrared spectrum of comet C/1996 B2 (Hyakutake) revealed the presence of acetylene (C2H2), estimated to be 0.3-0.9% relative to water, which is significant for understanding comet composition.
- - The findings suggest that the volatiles in comet Hyakutake likely originated from ice-covered interstellar grains instead of materials modified during the formation of the Solar System.
Article Abstract
Comets are rich in volatile materials, of which roughly 80% (by number) are water molecules. Considerable progress is being made in identifying the other volatile species, the abundances of which should enable us to determine whether comets formed primarily from ice-covered interstellar grains, or from material that was chemically processed in the early solar nebula. Here we report the detection of acetylene (C2H2) in the infrared spectrum of comet C/1996 B2 (Hyakutake). The estimated abundance is 0.3-0.9%, relative to water, which is comparable to the predicted solid-phase abundance in cold interstellar clouds. This suggests that the volatiles in comet Hyakotake may have come from ice-covered interstellar grains, rather than material processed in the accretion disk out of which the Solar System formed.
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| http://dx.doi.org/10.1038/383606a0 | DOI Listing |
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