2008/09/25 by Damien Hutsemékers, D. Hutsemekers, J. Manfroid +5 · 1 citation
Chemistry · Earth and Planetary Sciences · Environmental Science · Physics and Astronomy · #Analytical Chemistry (journal) #Astro and Planetary Science #Astronomy #Astrophysics #Atmospheric Ozone and Climate #Chemistry #Comet #Environmental chemistry #Isotope #Isotope Analysis in Ecology #Nuclear physics #Optics #Physics #Spectral line #Spectrograph #Ultraviolet #Very Large Telescope #astro-ph
paper · pdf · doi:10.1051/0004-6361:200810833
Accepted for publication in A&A Letters
arxiv created 2008/09/25 · openalex publication_date 2008/10/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The 16OH/18OH and OD/OH isotope ratios are measured in the Oort-Cloud comet C/2002 T7 (LINEAR) through ground-based observations of the OH ultraviolet bands at 3063 Å (0, 0) and 3121 Å (1, 1) obtained with the Very Large Telescope (VLT) feeding the Ultraviolet-Visual Echelle Spectrograph (UVES). From the 16OH/18OH ratio, we find 16O/18O = , equal within the uncertainties to the terrestrial value and to the ratio measured in other comets, although marginally smaller. We also estimate OD/OH from which we derive in water. This value is compatible with the water D/H ratios evaluated in other comets and is marginally higher than the terrestrial value.