| Literature DB >> 25501976 |
K Altwegg1, H Balsiger2, A Bar-Nun3, J J Berthelier4, A Bieler5, P Bochsler2, C Briois6, U Calmonte2, M Combi7, J De Keyser8, P Eberhardt2, B Fiethe9, S Fuselier10, S Gasc2, T I Gombosi7, K C Hansen7, M Hässig11, A Jäckel2, E Kopp2, A Korth12, L LeRoy2, U Mall12, B Marty13, O Mousis14, E Neefs8, T Owen15, H Rème16, M Rubin2, T Sémon2, C-Y Tzou2, H Waite10, P Wurz2.
Abstract
The provenance of water and organic compounds on Earth and other terrestrial planets has been discussed for a long time without reaching a consensus. One of the best means to distinguish between different scenarios is by determining the deuterium-to-hydrogen (D/H) ratios in the reservoirs for comets and Earth's oceans. Here, we report the direct in situ measurement of the D/H ratio in the Jupiter family comet 67P/Churyumov-Gerasimenko by the ROSINA mass spectrometer aboard the European Space Agency's Rosetta spacecraft, which is found to be (5.3 ± 0.7) × 10(-4)—that is, approximately three times the terrestrial value. Previous cometary measurements and our new finding suggest a wide range of D/H ratios in the water within Jupiter family objects and preclude the idea that this reservoir is solely composed of Earth ocean-like water.Entities:
Year: 2014 PMID： 25501976 DOI： 10.1126/science.1261952
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728