Ocean-like water in the Jupiter-family comet 103P/Hartley 2

  title={Ocean-like water in the Jupiter-family comet 103P/Hartley 2},
  author={P. Hartogh and D. Lis and D. Bockel{\'e}e-Morvan and Miguel de Val-Borro and N. Biver and M. K{\"u}ppers and M. Emprechtinger and E. Bergin and J. Crovisier and M. Rengel and R. Moreno and S. Szutowicz and G. Blake},
For decades, the source of Earth's volatiles, especially water with a deuterium-to-hydrogen ratio (D/H) of (1.558 ± 0.001) × 10−4, has been a subject of debate. The similarity of Earth’s bulk composition to that of meteorites known as enstatite chondrites suggests a dry proto-Earth with subsequent delivery of volatiles by local accretion or impacts of asteroids or comets. Previous measurements in six comets from the Oort cloud yielded a mean D/H ratio of (2.96 ± 0.25) × 10−4. The D/H value in… Expand
67P/Churyumov-Gerasimenko, a Jupiter family comet with a high D/H ratio
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 is found to be (5.3 ± 0.7) × 10−4—that is, approximately three times the terrestrial value. 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
A unified model for hydrogen in the Earth and Moon: No one expects the Theia contribution
Abstract The Moon is thought to have formed after a planetary embryo, known as Theia, collided with the proto-Earth 4.5 billion years ago. This so-called Giant Impact was the last major event duringExpand
The deuterium fractionation of water on solar-system scales in deeply-embedded low-mass protostars
Context. The chemical evolution of water through the star formation process directly affects the initial conditions of planet formation. The water deuterium fractionation (HDO/H2O abundance ratio)Expand
The comet-like composition of a protoplanetary disk as revealed by complex cyanides
It is found that the abundance ratios of these nitrogen-bearing organics in the gas phase are similar to those in comets, which implies that complex organics accompany simpler volatiles in protoplanetary disks, and that the rich organic chemistry of the authors' solar nebula was not unique. Expand
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
An asteroidal origin for water in the Moon
It is determined that a combination of carbonaceous chondrite-type materials were responsible for the majority of water (and nitrogen) delivered to the Earth–Moon system and that comets containing water enriched in deuterium contributed significantly <20% of the water in the Moon. Expand
Dwarf planet Ceres and the ingredients of life
Recent spacecraft studies of Comet 67P/Churyumov-Gerasimenko with Rosetta and of Ceres provide evidence that complex organic molecules and even amino acids are ubiquitous on small bodies in the solar system and that water ice is abundant in the asteroid belt. Expand
A study of deuterated water in the low-mass protostar IRAS 16293-2422
Context. Water is a primordial species in the emergence of life, and comets may have brought a large fraction to Earth to form the oceans. To understand the evolution of water from the first stagesExpand
Chemodynamical Deuterium Fractionation in the Early Solar Nebula: The Origin of Water on Earth and in Asteroids and Comets
Formation and evolution of water in the solar system and the origin of water on Earth constitute one of the most interesting questions in astronomy. The prevailing hypothesis for the origin of waterExpand


Earth- and space-based observations provide synergistic information for space mission encounters by providing data over longer timescales, at different wavelengths and using techniques that areExpand
Discovery of Interstellar Heavy Water
We report the discovery of doubly deuterated water (D2O, heavy water) in the interstellar medium. Using the James Clerk Maxwell Telescope and the Caltech Submillimeter Observatory 10 m telescope, weExpand
Possible cometary origin of heavy noble gases in the atmospheres of Venus, Earth and Mars
It is proposed here that the noble gases in the atmospheres of all of the terrestrial planets are dominated by a mixture of an internal component and a contribution from impacting icy planetesimals (comets), illustrating the importance of impacts in determining the volatile inventories of these planets. Expand
Deuterated Water in Comet C/1996 B2 (Hyakutake) and Its Implications for the Origin of Comets☆
The close approach to the Earth of Comet C/1996 B2 (Hyakutake) in March 1996 allowed searches for minor volatile species outgassed from the nucleus. We report the detection of deuterated water (HDO)Expand
Solar System Deuterium/Hydrogen Ratio
The D/H variations in chondritic meteorites are reviewed and compared with astronomical observations in the interstellar medium. The observed D enrichment in organic molecules — and to a lesserExpand
Constraints on the Formation of Comets from D/H Ratios Measured in H2O and HCN
This report is the follow-up of the paper of A. Drouart et al. (1999, Icarus140, 129) in which it was demonstrated that appropriate models of the solar nebula permit us to interpret the deuteriumExpand
Source regions and timescales for the delivery of water to the Earth
— In the primordial solar system, the most plausible sources of the water accreted by the Earth were in the outer asteroid belt, in the giant planet regions, and in the Kuiper Belt. We investigateExpand
Water and Related Chemistry in the Solar System. A Guaranteed Time Key Programme for Herschel
“Water and related chemistry in the Solar System” is a Herschel Space Observatory Guaranteed-Time Key Programme. This project, approved by the European Space Agency, aims at determining theExpand
A Sensitive Search for Deuterated Water in Comet 8p/Tuttle
We report a sensitive search for deuterated water (HDO) in comet 8P/Tuttle using high-resolution spectroscopy at infrared (IR) wavelengths. The deuterium enrichment of cometary water is one of theExpand
Constitution of terrestrial planets
  • H. Wänke
  • Chemistry
  • Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1981
Reliable estimates of the bulk composition are so far restricted to the three planetary objects from which we have samples for laboratory investigation, i.e. the Earth, the Moon and the eucriteExpand