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Herschel/HIFI measu...
Herschel/HIFI measurements of the ortho/para ratio in water towards Sagittarius B2(M) and W31C
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- Lis, D. C. (author)
- California Institute of Technology (Caltech)
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- Phillips, T. G. (author)
- California Institute of Technology (Caltech)
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Goldsmith, P. F. (author)
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show more...
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- Neufeld, D. A. (author)
- Johns Hopkins University
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- Herbst, E. (author)
- Ohio State University
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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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- 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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- Muller, Holger (author)
- Universität zu Köln,University of Cologne
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- Bergin, E. A. (author)
- University of Michigan
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- Gerin, M. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France
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- Bell, T. A. (author)
- California Institute of Technology (Caltech)
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- Emprechtinger, M. (author)
- California Institute of Technology (Caltech)
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- Black, John H, 1949 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Blake, G. A. (author)
- California Institute of Technology (Caltech)
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- Boulanger, F. (author)
- Institut d'Astrophysique Spatiale
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- Caux, E. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France,Université de Toulouse,University of Toulouse
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Ceccarelli, C. (author)
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- Cernicharo, J. (author)
- Centro de Astrobiologia (CAB)
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- Coutens, A. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France,Université de Toulouse,University of Toulouse
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- Crockett, N. R. (author)
- University of Michigan
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- Daniel, F. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France,Centro de Astrobiologia (CAB)
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- Dartois, E. (author)
- Institut d'Astrophysique Spatiale
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- de Luca, M. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France
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- Dubernet, M. L. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France,LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France
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- Encrenaz, P. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France
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- Falgarone, E. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France
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- Geballe, T. R. (author)
- Gemini Observatory North
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- Godard, B. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France
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- Giesen, T. F. (author)
- Universität zu Köln,University of Cologne
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- Goicoechea, J. R. (author)
- Centro de Astrobiologia (CAB)
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Gry, C. (author)
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Gupta, H. (author)
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- Hennebelle, P. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France
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Hily-Blant, P. (author)
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- Kolos, R. (author)
- Polish Academy of Sciences
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- Krelowski, J. (author)
- Uniwersytet Mikolaja Kopernika w Toruniu,Nicolaus Copernicus University
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- Joblin, C. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France,Université de Toulouse,University of Toulouse
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- Johnstone, D. (author)
- National Research Council Canada
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- Kazmierczak, M. (author)
- Uniwersytet Mikolaja Kopernika w Toruniu,Nicolaus Copernicus University
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- Lord, S. D. (author)
- California Institute of Technology (Caltech)
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Maret, S. (author)
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- Martin, P. G. (author)
- Institut canadien d'astrophysique théorique,Canadian Institute for Theoretical Astrophysics
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- Martin-Pintado, J. (author)
- Centro de Astrobiologia (CAB)
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- Melnick, G. J. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Menten, K. M. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Monje, Raquel, 1979 (author)
- California Institute of Technology (Caltech)
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- Mookerjea, B. (author)
- Tata Institute of Fundamental Research
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- Morris, P. (author)
- California Institute of Technology (Caltech)
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- Murphy, J. A. (author)
- Maynooth University
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- Ossenkopf, V. (author)
- Netherlands Institute for Space Research (SRON),Universität zu Köln,University of Cologne
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Pearson, J. C. (author)
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- Perault, M. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France
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- Persson, Carina, 1964 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Plume, R. (author)
- University of Calgary
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- Qin, S. L. (author)
- Universität zu Köln,University of Cologne
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- Salez, M. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France
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- Schlemmer, S. (author)
- Universität zu Köln,University of Cologne
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- Schmidt, M. (author)
- Polish Academy of Sciences
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- Sonnentrucker, P. (author)
- Johns Hopkins University
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- Stutzki, J. (author)
- Universität zu Köln,University of Cologne
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- Teyssier, D. (author)
- European Space Astronomy Centre (ESAC)
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- Trappe, N. (author)
- Maynooth University
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- van der Tak, F. F. S. (author)
- Netherlands Institute for Space Research (SRON)
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- Vastel, C. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France,Université de Toulouse,University of Toulouse
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- Wang, S. (author)
- University of Michigan
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Yorke, H. W. (author)
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Yu, S. (author)
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- Zmuidzinas, J. (author)
- California Institute of Technology (Caltech)
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- Boogert, A. (author)
- California Institute of Technology (Caltech)
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- Erickson, N. (author)
- University of Massachusetts
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- Karpov, A. (author)
- California Institute of Technology (Caltech)
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- Kooi, J. (author)
- California Institute of Technology (Caltech)
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Maiwald, F. W. (author)
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- Schieder, R. (author)
- Universität zu Köln,University of Cologne
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- Zaal, P. (author)
- Netherlands Institute for Space Research (SRON)
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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: L26 -
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https://www.aanda.or...
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Abstract
Subject headings
Close
- We present Herschel/HIFI observations of the fundamental rotational transitions of ortho- and para-H216O and H218O in absorption towards Sagittarius B2(M) and W31C. The ortho/para ratio in water in the foreground clouds on the line of sight towards these bright continuum sources is generally consistent with the statistical high-temperature ratio of 3, within the observational uncertainties. However, somewhat unexpectedly, we derive a low ortho/para ratio of 2.35 +/- 0.35, corresponding to a spin temperature of similar to 27 K, towards Sagittarius B2(M) at velocities of the expanding molecular ring. Water molecules in this region appear to have formed with, or relaxed to, an ortho/para ratio close to the value corresponding to the local temperature of the gas and dust.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- astronomy
- cdms
- submillimeter: ISM
- absorption
- ammonia
- ISM: abundances
- molecular clouds
- astrochemistry
- submillimeter
- ISM: molecules
- molecular processes
- oxygen
- vapor
- cologne database
- spectroscopy
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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Lis, D. C.
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Phillips, T. G.
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Goldsmith, P. F.
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Neufeld, D. A.
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Herbst, E.
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Comito, C.
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show more...
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Schilke, P.
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Muller, Holger
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Bergin, E. A.
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Gerin, M.
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Bell, T. A.
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Emprechtinger, M ...
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Black, John H, 1 ...
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Blake, G. A.
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Boulanger, F.
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Caux, E.
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Ceccarelli, C.
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Cernicharo, J.
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Coutens, A.
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Crockett, N. R.
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Daniel, F.
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Dartois, E.
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de Luca, M.
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Dubernet, M. L.
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Encrenaz, P.
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Falgarone, E.
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Geballe, T. R.
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Godard, B.
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Giesen, T. F.
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Goicoechea, J. R ...
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Gry, C.
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Gupta, H.
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Hennebelle, P.
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Hily-Blant, P.
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Kolos, R.
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Krelowski, J.
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Joblin, C.
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Johnstone, D.
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Kazmierczak, M.
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Lord, S. D.
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Maret, S.
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Martin, P. G.
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Martin-Pintado, ...
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Melnick, G. J.
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Menten, K. M.
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Monje, Raquel, 1 ...
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Mookerjea, B.
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Morris, P.
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Murphy, J. A.
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Ossenkopf, V.
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Pearson, J. C.
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Perault, M.
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Persson, Carina, ...
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Plume, R.
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Qin, S. L.
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Salez, M.
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Schlemmer, S.
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Schmidt, M.
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Sonnentrucker, P ...
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Stutzki, J.
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Teyssier, D.
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Trappe, N.
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van der Tak, F. ...
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Vastel, C.
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Wang, S.
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Yorke, H. W.
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Yu, S.
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Zmuidzinas, J.
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Boogert, A.
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Erickson, N.
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Karpov, A.
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Kooi, J.
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Maiwald, F. W.
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Schieder, R.
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Zaal, P.
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show less...
- 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