From the Interstellar Medium to Earth's Oceans via Comets - An Isotopic Study of HDO/H20
Publication date: 02 July 1999
Authors: Laufer, D.G. et al.
Page: pp. 446-450
Copyright: Academic Press
The very similar D/H ratio in the water of Comets Halley, Hyakutake, and Hale-Bopp (~3 × 10-4) is 10-20 times larger then the D/H ratio in the solar nebula. Therefore the cometary water had to originate in a giant molecular cloud, where the HDO is enriched by ion-molecule reactions.Link to publication