Details

Autor(en) / Beteiligte

• Altwegg, K.
• Balsiger, H.
• Bar-Nun, A.
• Berthelier, J. J.
• Bieler, A.
• Bochsler, P.
• Briois, C.
• Calmonte, U.
• Combi, M.
• De Keyser, J.
• Eberhardt, P.
• Fiethe, B.
• Fuselier, S.
• Gasc, S.
• Gombosi, T. I.
• Hansen, K.C.
• Hässig, M.
• Jäckel, A.
• Kopp, E.
• Korth, A.
• LeRoy, L.
• Mall, U.
• Marty, B.
• Mousis, O.
• Neefs, E.
• Owen, T.
• Rème, H.
• Rubin, M.
• Sémon, T.
• Tzou, C.-Y.
• Waite, H.
• Wurz, P.

Titel

67P/Churyumov-Gerasimenko, a Jupiter family comet with a high D/H ratio

Ist Teil von

• Science (American Association for the Advancement of Science), 2015-01, Vol.347 (6220), p.390-391

Ort / Verlag

Washington: American Association for the Advancement of Science

Erscheinungsjahr

2015

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• 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.