Measurements of 12 C/ 13 C, 14 N/ 15 N, and 32 S/ 34 S Ratios in Comet Hale-Bopp (C/1995 O1)
- 3 October 1997
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 278 (5335), 90-93
- https://doi.org/10.1126/science.278.5335.90
Abstract
The 12 C/ 13 C, 14 N/ 15 N, and 32 S/ 34 S isotope ratios in comet Hale-Bopp (C/1995 O1) were determined through observations taken with the James Clerk Maxwell Telescope. Measurements of rare isotopes in HCN and CS revealed isotope ratios of H 12 CN/H 13 CN = 111 ± 12, HC 14 N/HC 15 N = 323 ± 46, and C 32 S/C 34 S = 27 ± 3. Within the measurement uncertainties, the isotopic ratios are consistent with solar system values. The cometary volatiles thus have an origin in the solar system and show no evidence for an interstellar component.Keywords
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