Reference : Isotopic abundance in the CN coma of comets: Ten years of measurements
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/22314
Isotopic abundance in the CN coma of comets: Ten years of measurements
English
Schulz, R. [Research and Scientific Support Department, ESA, Postbus 299, 2200 AG Noordwijk, The Netherlands]
Jehin, Emmanuel mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Manfroid, Jean mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Hutsemekers, Damien mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Arpigny, Claude mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Cochran, A. [Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 1400, USA]
Zucconi, J*-M [Observatoire de Besançon, F25010 Besançon Cedex, France]
Stuwe [ > > ]
1-Nov-2008
Planetary and Space Science
Pergamon Press - An Imprint of Elsevier Science
56
1713-1718
Yes (verified by ORBi)
International
0032-0633
Oxford
United Kingdom
[en] Over the past 10 years the isotopic ratios of carbon ([SUP]12[/SUP]C/[SUP]13[/SUP]C) and nitrogen ([SUP]14[/SUP]N/[SUP]15[/SUP]N) have been determined for a dozen comets, bright enough to allow obtaining the required measurements from the ground. The ratios were derived from high-resolution spectra of the CN coma measured in the B[SUP]2[/SUP]â [SUP]+[/SUP]â X[SUP]2[/SUP]â [SUP]+[/SUP] (0, 0) emission band around 387 nm. The observed comets belong to different dynamical classes, including dynamically new as well as long- and short-period comets from the Halley- and Jupiter-family. In some cases the comets could be observed at various heliocentric distances. All values determined for the carbon and nitrogen isotopic ratios were consistent within the error margin irrespective of the type of comet or the heliocentric distance at which it was observed. Our investigations resulted in average ratios of [SUP]12[/SUP]C/[SUP]13[/SUP]C=91±21 and nitrogen [SUP]14[/SUP]N/[SUP]15[/SUP]N=141±29. Whilst the value for the carbon isotopic ratio is in good agreement with the solar and terrestrial value of 89, the nitrogen isotopic ratio is very different from the telluric value of 272.
Researchers ; Students
http://hdl.handle.net/2268/22314
10.1016/j.pss.2008.08.001
http://cdsads.u-strasbg.fr/abs/2008P%26SS...56.1713S

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