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

@article{Altwegg201567PChuryumovGerasimenkoAJ,
  title={67P/Churyumov-Gerasimenko, a Jupiter family comet with a high D/H ratio},
  author={K. Altwegg and H. Balsiger and A. Bar-Nun and J. Berthelier and A. Bieler and P. Bochsler and C. Briois and U. Calmonte and M. Combi and J. De Keyser and P. Eberhardt and B. Fiethe and S. Fuselier and S. Gasc and T. Gombosi and K. Hansen and M. H{\"a}ssig and A. J{\"a}ckel and E. Kopp and A. Korth and L. LeRoy and U. Mall and B. Marty and O. Mousis and E. Neefs and T. Owen and H. R{\`e}me and M. Rubin and T. S{\'e}mon and C. Tzou and H. Waite and P. Wurz},
  journal={Science},
  year={2015},
  volume={347}
}
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… Expand
D/H in the refractory organics of comet 67P/Churyumov-Gerasimenko measured by Rosetta/COSIMA
The D/H ratio is a clue to the origin and evolution of hydrogen-bearing chemical species in Solar system materials. D/H has been observed in the coma of many comets, but most such measurements haveExpand
Detection of argon in the coma of comet 67P/Churyumov-Gerasimenko
TLDR
The detection of argon and its relation to the water abundance in the Jupiter family comet 67P/Churyumov-Gerasimenko is reported by in situ measurement of theRosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) mass spectrometer aboard the Rosetta spacecraft. Expand
Molecular nitrogen in comet 67P/Churyumov-Gerasimenko indicates a low formation temperature
TLDR
Direct measurements of N2 by instruments aboard the Rosetta spacecraft provide clues about the comet’s long history and depletion of molecular nitrogen at levels that are depleted compared to those in the primordial solar system suggests that the comet formed at low-temperature conditions below ~30 kelvin. Expand
Terrestrial deuterium-to-hydrogen ratio in water in hyperactive comets.
The D/H ratio in cometary water has been shown to vary between 1 and 3 times the Earth's oceans value, in both Oort cloud comets and Jupiter-family comets originating from the Kuiper belt. We presentExpand
Xenon isotopes in 67P/Churyumov-Gerasimenko show that comets contributed to Earth's atmosphere
TLDR
Xenon isotope ratios in a comet demonstrate that some of Earth’s atmosphere comes from impacting comets, which constrains the amount of other materials delivered to the authors' planet by comets. Expand
DYNAMIC DEUTERIUM ENRICHMENT IN COMETARY WATER VIA ELEY–RIDEAL REACTIONS
The deuterium-to-hydrogen ratio (D/H) in water found in the coma of Jupiter family comet (JFC) 67P/Churyumov–Gerasimenko was reported to be (5.3 ± 0.7) × 10^(−4), the highest among comets and threeExpand
The d/h Ratio and the Heating of the Early-Earth
The recent remarkable visit of the European Space Agency’s mission to the comet 67P/Chuyumov-Gerasimenko(hereafter 67P/C-G) by the Rosetta spacecraft see Altwegg et al. (2014) returned new importantExpand
Evolution of water production of 67P/Churyumov-Gerasimenko: an empirical model and a multi-instrument study
We examine the evolution of the water production of comet 67P/Churyumov-Gerasimenko during the Rosetta mission (June 2014 to May 2016) based on in situ and remote sensing measurements made by RosettaExpand
Exocomets in the Proxima Centauri system and their importance for water transport
The scenario and the efficiency of water transport by icy asteroids and comets are still amongst the most important unresolved questions about the early phases of planetary systems. The detection ofExpand
A gas-phase primordial origin of O 2 in comet 67P/Churyumov-Gerasimenko
Recent observations made by the Rosetta/ROSINA instrument have detected molecular oxygen in the coma of comet 67P/Churyumov-Gerasimenko with abundances at the 1–10 per cent level relative to H2O.Expand
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TLDR
It is reported that the D/H ratio in the Jupiter-family comet 103P/Hartley 2, which originated in the Kuiper belt, is (1.61 ± 0.24) × 10−4, which substantially expands the reservoir of Earth ocean-like water to include some comets, and is consistent with the emerging picture of a complex dynamical evolution of the early Solar System. Expand
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