Reference : The 16OH/18OH and OD/OH isotope ratios in comet C/2002 T7 (LINEAR)
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/33265
The 16OH/18OH and OD/OH isotope ratios in comet C/2002 T7 (LINEAR)
English
Hutsemekers, Damien mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Manfroid, Jean mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Jehin, Emmanuel mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Zucconi, J*-M [Observatoire de Besançon, 25010 Besançon Cedex, France]
Arpigny, Claude mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
1-Nov-2008
Astronomy and Astrophysics
EDP Sciences
490
Letters
31-34
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] comets: general ; comets: individual: C/2002 T7 (LINEAR)
[en] The [SUP]16[/SUP]OH/[SUP]18[/SUP]OH and OD/OH isotope ratios are measured in the Oort-Cloud comet C/2002 T7 (LINEAR) through ground-based observations of the OH A [SUP]2[/SUP]Σ[SUP]+[/SUP] - X [SUP]2[/SUP]Π[SUB]i[/SUB] ultraviolet bands at 3063 à (0, 0) and 3121 à (1, 1) obtained with the Very Large Telescope (VLT) feeding the Ultraviolet-Visual Echelle Spectrograph (UVES). From the [SUP]16[/SUP]OH/[SUP]18[/SUP]OH ratio, we find [SUP]16[/SUP]O/[SUP]18[/SUP]O = 425 ± 55, 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 D/H = 2.5 ± 0.7à 10[SUP]-4[/SUP] in water. This value is compatible with the water D/H ratios evaluated in other comets and is marginally higher than the terrestrial value. Based on observations collected at the European Southern Observatory, Paranal, Chile (ESO Programme 073.C-0525).
Researchers
http://hdl.handle.net/2268/33265
10.1051/0004-6361:200810833
http://cdsads.u-strasbg.fr/abs/2008A%26A...490L..31H
http://de.arxiv.org/abs/0809.4300

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