| Title: |
A D/H Ratio Consistent with Earth's Water in Halley-type Comet 12P from ALMA HDO Mapping |
| Authors: |
Cordiner, M.; Gibb, E.; Kisiel, Z.; Roth, N.; Biver, N.; Bockelée-Morvan, D.; Boissier, J.; Bonev, B.; Charnley, S.; Coulson, I.; Crovisier, J.; Drozdovskaya, M.; Furuya, K.; Jin, M.; Kuan, Y.-J.; Lippi, M.; Lis, D.; Milam, S.; Opitom, C.; Qi, C.; Remijan, A. |
| Contributors: |
GSFC Solar System Exploration Division; NASA Goddard Space Flight Center (GSFC); Catholic University of America; University of Missouri St. Louis; University of Missouri System; Institute of Physics, Polish Academy of Sciences; Polska Akademia Nauk = Polish Academy of Sciences = Académie polonaise des sciences (PAN); Astrochemistry Laboratory Greenbelt; Laboratoire d’Instrumentation et de Recherche en Astrophysique (LIRA); Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris; Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-CY Cergy Paris Université (CY); Institut de RadioAstronomie Millimétrique (IRAM); Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); Department of Physics Washington; American University Washington D.C. (AU); Institute of East Asian Studies Berkeley (IEAS); University of California Berkeley (UC Berkeley); University of California (UC)-University of California (UC); Universität Bern = University of Bern = Université de Berne (UNIBE); RIKEN Cluster for Pioneering Research (RIKEN PRI); RIKEN - Institute of Physical and Chemical Research Japon (RIKEN); National Taiwan Normal University (NTNU); INAF- Osservatorio Astrofisico di Arcetri (OAA); Istituto Nazionale di Astrofisica Rome (INAF); California Institute of Technology (CALTECH); Institute for Astronomy Edinburgh (IfA); The University of Edinburgh; Harvard-Smithsonian Center for Astrophysics (CfA); Harvard University-Smithsonian Institution; National Radio Astronomy Observatory Charlottesville (NRAO); National Radio Astronomy Observatory (NRAO) |
| Source: |
EISSN: 2397-3366 ; Nature Astronomy ; https://hal.science/hal-05403844 ; Nature Astronomy, 2025, 9 (10), pp.1476-1485. ⟨10.1038/s41550-025-02614-7⟩ |
| Publisher Information: |
CCSD; Nature Publishing Group |
| Publication Year: |
2025 |
| Collection: |
Université Paris Seine: ComUE (HAL) |
| Subject Terms: |
[SDU]Sciences of the Universe [physics] |
| Description: |
International audience ; Isotopic measurements of Solar System bodies provide a primary paradigm within which to understand the origins and histories of planetary materials. The deuterium-to-hydrogen (D/H) ratio, in particular, helps reveal the relationship between (and heritage of) different H2O reservoirs within the Solar System. Here we present interferometric maps of water (H2O) and semiheavy water (HDO) in the gas-phase coma of a comet (Halley-type comet 12P/Pons–Brooks), obtained using the Atacama Large Millimeter/submillimeter Array. The maps are consistent with outgassing of both H2O and HDO directly from the nucleus, and they imply a coma D/H ratio (for water) of (1.71 ± 0.44) × 10−4. This is at the lower end of the range of previously observed values in comets and is consistent with D/H in Earth’s ocean water. Our results indicate a possible common heritage between a component of the water ice reservoir in the Oort cloud and the water that was delivered to the young Earth during the early history of the Solar System. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/arxiv/2508.05925; ARXIV: 2508.05925 |
| DOI: |
10.1038/s41550-025-02614-7 |
| Availability: |
https://hal.science/hal-05403844; https://hal.science/hal-05403844v1/document; https://hal.science/hal-05403844v1/file/2508.05925v1.pdf; https://doi.org/10.1038/s41550-025-02614-7 |
| Rights: |
https://creativecommons.org/licenses/by-nc-nd/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.6038A6E2 |
| Database: |
BASE |