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Search: WFRF:(Tielens Alexander G. G. M.) > OH as a probe of th...

OH as a probe of the warm-water cycle in planet-forming disks

Zannese, Marion (author)
Université Paris-Saclay,University Paris-Saclay
Tabone, Benoit (author)
Université Paris-Saclay,University Paris-Saclay
Habart, Emilie (author)
Université Paris-Saclay,University Paris-Saclay
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Goicoechea, Javier R. (author)
CSIC - Instituto de Fisica Fundamental (IFF)
Zanchet, Alexandre (author)
CSIC - Instituto de Fisica Fundamental (IFF)
van Dishoeck, Ewine F. (author)
Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universiteit Leiden (UL),Leiden University (UL)
van Hemert, Marc C. (author)
Universiteit Leiden (UL),Leiden University (UL)
Black, John H, 1949 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Tielens, Alexander G. G. M. (author)
University of Maryland,Universiteit Leiden (UL),Leiden University (UL)
Veselinova, A. (author)
Jambrina, P. G. (author)
Menendez, M. (author)
Universidad Complutense de Madrid,Complutense University
Verdasco, E. (author)
Universidad Complutense de Madrid,Complutense University
Aoiz, F. J. (author)
Universidad Complutense de Madrid,Complutense University
Gonzalez-Sanchez, L. (author)
Trahin, Boris (author)
Université Paris-Saclay,University Paris-Saclay
Dartois, Emmanuel (author)
Université Paris-Saclay,University Paris-Saclay
Berne, Olivier (author)
Universite Paul Sabatier Toulouse III,Paul Sabatier University
Peeters, Els (author)
Western University
He, Jinhua (author)
Chinese Academy of Sciences,Universidad de Chile (UCH),University of Chile (UCH)
Sidhu, Ameek (author)
Western University
Chown, Ryan (author)
Western University
Schroetter, Ilane (author)
Universite Paul Sabatier Toulouse III,Paul Sabatier University
van de Putte, Dries (author)
Space Telescope Science Institute (STScI)
Canin, Amelie (author)
Universite Paul Sabatier Toulouse III,Paul Sabatier University
Alarcon, Felipe (author)
University of Michigan
Abergel, Alain (author)
Université Paris-Saclay,University Paris-Saclay
Bergin, Edwin A. (author)
University of Michigan
Bernard-Salas, Jeronimo (author)
CERGA (Centre d'Etudes et de Recherche de Grasse ACRI)
Boersma, Christiaan (author)
NASA Ames Research Center
Bron, Emeric (author)
Sorbonne Université,Sorbonne University
Cami, Jan (author)
Western University
Dicken, Daniel (author)
Royal Observatory
Elyajouri, Meriem (author)
Université Paris-Saclay,University Paris-Saclay
Fuente, Asuncion (author)
Gordon, Karl D. (author)
Space Telescope Science Institute (STScI),Universiteit Gent,Ghent university
Issa, Lina (author)
Universite Paul Sabatier Toulouse III,Paul Sabatier University
Joblin, Christine (author)
Universite Paul Sabatier Toulouse III,Paul Sabatier University
Kannavou, Olga (author)
Université Paris-Saclay,University Paris-Saclay
Khan, Baria (author)
Western University
Languignon, David (author)
Sorbonne Université,Sorbonne University
Le Gal, Romane (author)
Université Grenoble Alpes,Grenoble Alpes University,Institut de Radioastronomie Millimétrique (IRAM)
Maragkoudakis, Alexandros (author)
NASA Ames Research Center
Meshaka, Raphael (author)
Sorbonne Université,Sorbonne University,Université Paris-Saclay,University Paris-Saclay
Okada, Yoko (author)
Universität zu Köln,University of Cologne
Onaka, Takashi (author)
University of Tokyo, Japan,Meisei University
Pasquini, Sofia (author)
Western University
Pound, Marc W. (author)
University of Michigan
Robberto, Massimo (author)
Space Telescope Science Institute (STScI)
Roellig, Markus (author)
Universität zu Köln,University of Cologne
Schefter, Bethany (author)
Western University
Schirmer, Thiébaut-Antoine, 1992 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Vicente, Silvia (author)
Instituto de Astrofísica e Ciências do Espaço (IA),Institute of Astrophysics and Space Sciences (IA)
Wolfire, Mark G. (author)
University of Maryland
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 (creator_code:org_t)
2024
2024
English.
In: NATURE ASTRONOMY. - 2397-3366. ; In Press
Related links:
https://doi.org/10.1...
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https://research.cha...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Water is a key ingredient for the emergence of life as we know it. Yet, its destruction and reformation in space remain unprobed in warm gas (T > 300 K). Here we detect with the James Webb Space Telescope the emission of the hydroxyl radical (OH) from d203-506, a planet-forming disk exposed to external far-ultraviolet (FUV) radiation. These observations were made as part of the Early Release Science programme PDRs4All, which is focused on the Orion bar. The observed OH spectrum is compared with the results of quantum dynamical calculations to reveal two essential molecular processes. The highly excited rotational lines of OH in the mid-infrared are telltale signs of H2O destruction by FUV radiation. The OH rovibrational lines in the near-infrared are attributed to chemical excitation by the key reaction O + H-2 -> OH + H, which seeds the formation of water in the gas phase. These results show that under warm and irradiated conditions, water is destroyed and efficiently reformed through gas-phase reactions. We infer that, in this source, the equivalent of Earth oceans' worth of water is destroyed per month and replenished. This warm-water cycle could reprocess some water inherited from cold interstellar clouds and explain the lower deuterium fraction of water in Earth's oceans compared with that found around protostars.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

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art (subject category)
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