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HERSCHEL OBSERVATIO...
HERSCHEL OBSERVATIONS of INTERSTELLAR CHLORONIUM. II. DETECTIONS TOWARD G29.96-0.02, W49N, W51, and W3(OH), and DETERMINATIONS of the ORTHO-TO-PARA and 35Cl/37Cl ISOTOPIC RATIOS
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- Neufeld, D.A. (author)
- Johns Hopkins University
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- Black, John H, 1949 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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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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- Goicoechea, J.R. (author)
- CSIC - Instituto de Ciencia de Materiales de Madrid (ICMM)
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Goldsmith, P.F. (author)
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- Gry, C. (author)
- Laboratoire d'Astrophysique de Marseille
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- Gupta, H. (author)
- California Institute of Technology (Caltech)
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- Herbst, E. (author)
- University of Virginia
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- Indriolo, N. (author)
- University of Michigan
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- Lis, D. (author)
- LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France,California Institute of Technology (Caltech)
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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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- Persson, Carina, 1964 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Schilke, P. (author)
- Universität zu Köln,University of Cologne
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- Sonnentrucker, P. (author)
- Space Telescope Science Institute (STScI)
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- Wolfire, M.G. (author)
- University of Maryland
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(creator_code:org_t)
- 2015
- 2015
- English.
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In: Astrophysical Journal. - 1538-4357 .- 0004-637X. ; 807:1
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Abstract
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- We report additional detections of the chloronium molecular ion, H2Cl+, toward four bright submillimeter continuum sources: G29.96-0.02, W49N, W51, and W3(OH). With the use of the HIFI instrument on board the Herschel Space Observatory, we observed the 212-101 transition of ortho-H235Cl+ at 781.627 GHz in absorption toward all four sources. Much of the detected absorption arises in diffuse foreground clouds that are unassociated with the background continuum sources and in which our best estimates of the N(H2Cl+)/N(H) ratio lie in the range (0.9-4.8)× 10-9. These chloronium abundances relative to atomic hydrogen can exceed the predictions of current astrochemical models by up to a factor of 5. Toward W49N, we have also detected the 212-101 transition of ortho-H237Cl+ at 780.053 GHz and the 111-000 transition of para-H235Cl+ at 485.418 GHz. These observations imply H235Cl+/H237Cl+ column density ratios that are consistent with the solar system 35Cl/37Cl isotopic ratio of 3.1, and chloronium ortho-to-para ratios consistent with 3, the ratio of spin statistical weights.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
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- art (subject category)
- ref (subject category)
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- By the author/editor
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Neufeld, D.A.
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Black, John H, 1 ...
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Gerin, M.
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Goicoechea, J.R.
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Goldsmith, P.F.
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Gry, C.
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show more...
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Gupta, H.
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Herbst, E.
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Indriolo, N.
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Lis, D.
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Menten, K.M.
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Monje, Raquel, 1 ...
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Mookerjea, B.
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Persson, Carina, ...
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Schilke, P.
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Sonnentrucker, P ...
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Wolfire, M.G.
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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 Fusion Plasma an ...
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Astrophysical Jo ...
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Chalmers University of Technology