Water D/H ratio in Astronomy

References to the points can be found in Persson et al. (2014) [OA : http://arxiv.org/abs/1402.1398], except for the ISM (H2O model) value which is from Albertsson et al. (2014) [OA : http://arxiv.org/abs/1401.6035] and the highest value for the JFC comets which is from Altwegg et al. (2014) [http://www.sciencemag.org/content/early/2014/12/09/science.1261952.abstract]