Reference : New constraints on the delivery of cometary water and nitrogen to Earth from the 15N/14N...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/33891
New constraints on the delivery of cometary water and nitrogen to Earth from the 15N/14N isotopic ratio
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 >]
Arpigny, Claude mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
1-Nov-2009
Icarus: International Journal of Solar System Studies
Academic Press
204
346-348
Yes (verified by ORBi)
International
0019-1035
San Diego
CA
[en] New independent constraints on the amount of water delivered to Earth by comets are derived using the [SUP]15[/SUP]N/[SUP]14[/SUP]N isotopic ratio, measured to be roughly twice as high in cometary CN and HCN as in the present Earth. Under reasonable assumptions, we find that no more than a few percent of Earthâ s water can be attributed to comets, in agreement with the constraints derived from D/H. Our results also suggest that a significant part of Earthâ s atmospheric nitrogen might come from comets. Since the [SUP]15[/SUP]N/[SUP]14[/SUP]N isotopic ratio is not different in Oort-cloud and Kuiper-belt comets, our estimates apply to the contribution of both types of objects.
Researchers
http://hdl.handle.net/2268/33891
10.1016/j.icarus.2009.06.021
http://cdsads.u-strasbg.fr/abs/2009Icar..204..346H
http://de.arxiv.org/abs/0906.5221

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