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Ortho-to-para ratio...
Ortho-to-para ratio of interstellar heavy water
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- Vastel, C. (author)
- Universite Paul Sabatier Toulouse III,Paul Sabatier University,Institut National des Sciences de l'Univers
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- Ceccarelli, C. (author)
- Laboratoire d'Astrophysique de Bordeaux,Institut National des Sciences de l'Univers,Université Grenoble Alpes,Grenoble Alpes University
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- Caux, E. (author)
- Universite Paul Sabatier Toulouse III,Paul Sabatier University,Institut National des Sciences de l'Univers
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show more...
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- Coutens, A. (author)
- Institut National des Sciences de l'Univers,Universite Paul Sabatier Toulouse III,Paul Sabatier University
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- Cernicharo, J. (author)
- Centro de Astrobiologia (CAB)
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- Bottinelli, S. (author)
- Universite Paul Sabatier Toulouse III,Paul Sabatier University,Institut National des Sciences de l'Univers
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- Demyk, K. (author)
- Institut National des Sciences de l'Univers,Universite Paul Sabatier Toulouse III,Paul Sabatier University
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- Faure, A. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Wiesenfeld, L. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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Scribano, Y. (author)
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- Bacmann, A. (author)
- Université Grenoble Alpes,Grenoble Alpes University,Institut National des Sciences de l'Univers,Laboratoire d'Astrophysique de Bordeaux
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- Hily-Blant, P. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Maret, S. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Walters, A. (author)
- Institut National des Sciences de l'Univers,Universite Paul Sabatier Toulouse III,Paul Sabatier University
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- Bergin, E. A. (author)
- University of Michigan
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- Blake, G. A. (author)
- California Institute of Technology (Caltech)
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- Castets, A. (author)
- Laboratoire d'Astrophysique de Bordeaux,Institut National des Sciences de l'Univers,Université Grenoble Alpes,Grenoble Alpes University
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- Crimier, N. (author)
- Université Grenoble Alpes,Grenoble Alpes University,Centro de Astrobiologia (CAB)
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- Dominik, C. (author)
- Anton Pannekoek Institute for Astronomy,Radboud Universiteit,Radboud University
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- Encrenaz, P. (author)
- Ecole Normale Superieure (ENS)
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- Gerin, M. (author)
- Ecole Normale Superieure (ENS)
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- Hennebelle, P. (author)
- Ecole Normale Superieure (ENS)
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- Kahane, C. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Klotz, A. (author)
- Institut National des Sciences de l'Univers,Universite Paul Sabatier Toulouse III,Paul Sabatier University
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- Melnick, G. J. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Pagani, L. (author)
- Ecole Normale Superieure (ENS)
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- Parise, B. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Schilke, P. (author)
- Universität zu Köln,University of Cologne,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Wakelam, V. (author)
- Institut National des Sciences de l'Univers,Laboratoire d'Astrophysique de Bordeaux
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- Baudry, A. (author)
- Laboratoire d'Astrophysique de Bordeaux,Institut National des Sciences de l'Univers
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- Bell, T. A. (author)
- California Institute of Technology (Caltech)
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Benedettini, M. (author)
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- Boogert, A. (author)
- California Institute of Technology (Caltech)
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- Cabrit, S. (author)
- Ecole Normale Superieure (ENS)
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- Caselli, P. (author)
- University of Leeds
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- Codella, C. (author)
- Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory
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- Comito, C. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Falgarone, E. (author)
- Ecole Normale Superieure (ENS)
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- Fuente, A. (author)
- Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
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Goldsmith, P. F. (author)
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- Helmich, F. (author)
- Netherlands Institute for Space Research (SRON)
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- Henning, T. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Herbst, E. (author)
- Ohio State University
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- Jacq, T. (author)
- Institut National des Sciences de l'Univers,Laboratoire d'Astrophysique de Bordeaux
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- Kama, M. (author)
- Anton Pannekoek Institute for Astronomy
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Langer, W. D. (author)
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- Lefloch, B. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Lis, D. (author)
- California Institute of Technology (Caltech)
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- Lord, S. (author)
- California Institute of Technology (Caltech)
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- Lorenzani, A. (author)
- Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory
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- Neufeld, D. A. (author)
- Johns Hopkins University
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- Nisini, B. (author)
- Osservatorio Astronomico di Roma
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- Pacheco, S. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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Pearson, J. C. (author)
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- Phillips, T. (author)
- California Institute of Technology (Caltech)
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- Salez, M. (author)
- Ecole Normale Superieure (ENS)
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Saraceno, P. (author)
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- Schuster, K. (author)
- Institut de Radioastronomie Millimétrique (IRAM)
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- Tielens, X. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- van der Tak, F. F. S. (author)
- Rijksuniversiteit Groningen,University of Groningen,Netherlands Institute for Space Research (SRON)
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- van der Wiel, M. H. D. (author)
- Netherlands Institute for Space Research (SRON),Rijksuniversiteit Groningen,University of Groningen
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- Viti, S. (author)
- University College London (UCL)
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- Wyrowski, F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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Yorke, H. W. (author)
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- Cais, P. (author)
- Institut National des Sciences de l'Univers,Laboratoire d'Astrophysique de Bordeaux
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- Krieg, J. M. (author)
- Ecole Normale Superieure (ENS)
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- Olberg, Michael, 1956 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ravera, L. (author)
- Institut National des Sciences de l'Univers,Universite Paul Sabatier Toulouse III,Paul Sabatier University
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(creator_code:org_t)
- 2010-10-01
- 2010
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 521:1, s. Article Number: L31 -
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https://www.aanda.or...
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Abstract
Subject headings
Close
- Context. Despite the low elemental deuterium abundance in the Galaxy, enhanced molecular D/H ratios have been found in the environments of low-mass star-forming regions, and in particular the Class 0 protostar IRAS 16293-2422. Aims. The CHESS (Chemical HErschel Surveys of Star forming regions) key program aims to study the molecular complexity of the interstellar medium. The high sensitivity and spectral resolution of the Herschel/HIFI instrument provide a unique opportunity to observe the fundamental 1(1,1)-0(0,0) transition of the ortho-D2O molecule, which is inaccessible from the ground, and determine the ortho-to-para D2O ratio. Methods. We detected the fundamental transition of the ortho-D2O molecule at 607.35 GHz towards IRAS 16293-2422. The line is seen in absorption with a line opacity of 0.62 +/- 0.11 (1 sigma). From the previous ground-based observations of the fundamental 1(1,0)-1(0,1) transition of para-D2O seen in absorption at 316.80 GHz, we estimate a line opacity of 0.26 +/- 0.05 (1 sigma). Results. We show that the observed absorption is caused by the cold gas in the envelope of the protostar. Using these new observations, we estimate for the first time the ortho-to-para D2O ratio to be lower than 2.6 at a 3 sigma level of uncertainty, which should be compared with the thermal equilibrium value of 2:1.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- submillimeter: ISM
- spectroscopy
- ISM: abundances
- protostar iras 16293-2422
- envelope
- constraints
- astrochemistry
- ISM: molecules
- molecular processes
- line: identification
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
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Vastel, C.
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Ceccarelli, C.
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Caux, E.
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Coutens, A.
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Cernicharo, J.
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Bottinelli, S.
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show more...
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Demyk, K.
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Faure, A.
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Wiesenfeld, L.
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Scribano, Y.
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Bacmann, A.
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Hily-Blant, P.
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Maret, S.
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Walters, A.
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Bergin, E. A.
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Blake, G. A.
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Castets, A.
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Crimier, N.
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Dominik, C.
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Encrenaz, P.
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Gerin, M.
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Hennebelle, P.
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Kahane, C.
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Klotz, A.
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Melnick, G. J.
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Pagani, L.
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Parise, B.
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Schilke, P.
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Wakelam, V.
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Baudry, A.
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Bell, T. A.
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Benedettini, M.
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Boogert, A.
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Cabrit, S.
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Caselli, P.
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Codella, C.
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Comito, C.
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Falgarone, E.
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Fuente, A.
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Goldsmith, P. F.
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Helmich, F.
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Henning, T.
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Herbst, E.
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Jacq, T.
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Kama, M.
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Langer, W. D.
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Lefloch, B.
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Lis, D.
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Lord, S.
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Lorenzani, A.
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Neufeld, D. A.
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Nisini, B.
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Pacheco, S.
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Pearson, J. C.
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Phillips, T.
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Salez, M.
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Saraceno, P.
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Schuster, K.
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Tielens, X.
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van der Tak, F. ...
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van der Wiel, M. ...
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Viti, S.
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Wyrowski, F.
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Yorke, H. W.
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Cais, P.
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Krieg, J. M.
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Olberg, Michael, ...
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Ravera, L.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Astronomy and As ...
- By the university
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Chalmers University of Technology