Isotopic composition of cometary water and the origin of Earth’s oceans

Studies of the water content and isotopic composition of water-rich asteroids and comets are of key interest for understanding the late accretion stage of the Solar System cometary and chondritic materials. The PRobe Far-Infrared Mission for Astrophysics (PRIMA) can make an important contribution to solving this long-standing problem by carrying out direct measurements of the D/H ratio in a significant sample of Oort cloud and Kuiper belt comets, sampling the isotopic composition of the present-day outer Solar System. This would allow comparisons among different comet reservoirs and with inner Solar System measurements in meteorites, as well as searching for correlations with physical parameters, such as hyperactivity, providing quantitative constraints on the dynamical and chemical models of the early Solar System.

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Publication Details

Journal
Journal of Astronomical Telescopes Instruments and Systems
Published
2025-04-09
DOI
https://doi.org/10.1117/1.jatis.11.3.031605
Primary Topic
Astro and Planetary Science
Type
article
Field-Weighted Citation Impact
0.00

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article

Isotopic composition of cometary water and the origin of Earth’s oceans

N. Biver, Arielle Moullet, Paul von Allmen, D. C. Lis et al.
Journal of Astronomical Telescopes Instruments and Systems
Astro and Planetary Science
article

Isotopic composition of cometary water and the origin of Earth’s oceans

N. Biver, Arielle Moullet, Paul von Allmen, D. C. Lis, P. F. Goldsmith, Martin Cordiner, Dominique Bockelée-Morvan
article en

Abstract

Studies of the water content and isotopic composition of water-rich asteroids and comets are of key interest for understanding the late accretion stage of the Solar System cometary and chondritic materials. The PRobe Far-Infrared Mission for Astrophysics (PRIMA) can make an important contribution to solving this long-standing problem by carrying out direct measurements of the D/H ratio in a significant sample of Oort cloud and Kuiper belt comets, sampling the isotopic composition of the present-day outer Solar System. This would allow comparisons among different comet reservoirs and with inner Solar System measurements in meteorites, as well as searching for correlations with physical parameters, such as hyperactivity, providing quantitative constraints on the dynamical and chemical models of the early Solar System.

Journal of Astronomical Telescopes Instruments and SystemsVol. 11(03)
Centre National de la Recherche Scientifique (FR), Jet Propulsion Laboratory (US), University of America (US), Université Paris Cité (FR), National Radio Astronomy Observatory (US), Université Paris Sciences et Lettres (FR), Sorbonne Université (FR), CY Cergy Paris Université (FR), Catholic University of America (US)
National Aeronautics and Space Administration, California Institute of Technology, Jet Propulsion Laboratory, Planetary Science Division
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Astro and Planetary Science
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