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  • Mookerjea, B.Tata Institute of Fundamental Research (author)

Excitation and abundance of C3 in star forming cores Herschel/HIFI observations of the sight-lines to W31C and W49N

  • Article/chapterEnglish2010

Publisher, publication year, extent ...

  • 2010-10-01
  • EDP Sciences,2010
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:6371eb26-68b6-4ce6-aeaa-141bb84cde3e
  • https://doi.org/10.1051/0004-6361/201015095DOI
  • https://research.chalmers.se/publication/131846URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • We present spectrally resolved observations of triatomic carbon (C-3) in several ro-vibrational transitions between the vibrational ground state and the low-energy nu(2) bending mode at frequencies between 1654-1897 GHz along the sight-lines to the submillimeter continuum sources W31C and W49N, using Herschel's HIFI instrument. We detect C-3 in absorption arising from the warm envelope surrounding the hot core, as indicated by the velocity peak position and shape of the line profile. The sensitivity does not allow to detect C-3 absorption due to diffuse foreground clouds. From the column densities of the rotational levels in the vibrational ground state probed by the absorption we derive a rotation temperature (T-rot) of similar to 50-70 K, which is a good measure of the kinetic temperature of the absorbing gas, as radiative transitions within the vibrational ground state are forbidden. It is also in good agreement with the dust temperatures for W31C and W49N. Applying the partition function correction based on the derived T-rot, we get column densities N(C-3) similar to 7-9 x 10(14) cm(-2) and abundance x(C-3) similar to 10(-8) with respect to H-2. For W31C, using a radiative transfer model including far-infrared pumping by the dust continuum and a temperature gradient within the source along the line of sight we find that a model with x(C-3) = 10(-8), T-kin = 30-50 K, N(C-3) = 1.5 x 10(15) cm(-2) fits the observations reasonably well and provides parameters in very good agreement with the simple excitation analysis.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Giesen, T.Universität zu Köln,University of Cologne (author)
  • Stutzki, J.Universität zu Köln,University of Cologne (author)
  • Cernicharo, J.Centro de Astrobiologia (CAB) (author)
  • Goicoechea, J. R.Centro de Astrobiologia (CAB) (author)
  • de Luca, M.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Bell, T. A.California Institute of Technology (Caltech) (author)
  • Gupta, H. (author)
  • Gerin, M.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Persson, Carina,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)carina64 (author)
  • Sonnentrucker, P.Johns Hopkins University (author)
  • Makai, Z.Universität zu Köln,University of Cologne (author)
  • Black, John H,1949Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jblack (author)
  • Boulanger, F.Institut d'Astrophysique Spatiale (author)
  • Coutens, A.Université de Toulouse,University of Toulouse (author)
  • Dartois, E.Institut d'Astrophysique Spatiale (author)
  • Encrenaz, P.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Falgarone, E.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Geballe, T. R.Gemini Observatory North (author)
  • Godard, B.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Goldsmith, P. F. (author)
  • Gry, C.Laboratoire d'Astrophysique de Marseille (author)
  • Hennebelle, P.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Herbst, E.Ohio State University (author)
  • Hily-Blant, P. (author)
  • Joblin, C.Université de Toulouse,University of Toulouse (author)
  • Kazmierczak, M.Uniwersytet Mikolaja Kopernika w Toruniu,Nicolaus Copernicus University (author)
  • Kolos, R.Polish Academy of Sciences (author)
  • Krelowski, J.Uniwersytet Mikolaja Kopernika w Toruniu,Nicolaus Copernicus University (author)
  • Lis, D. C.California Institute of Technology (Caltech) (author)
  • Martin-Pintado, J.Centro de Astrobiologia (CAB) (author)
  • Menten, K. M.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Monje, Raquel,1979California Institute of Technology (Caltech)(Swepub:cth)em1raque (author)
  • Pearson, J. C. (author)
  • Perault, M.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Phillips, T. G.California Institute of Technology (Caltech) (author)
  • Plume, R.University of Calgary (author)
  • Salez, M.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Schlemmer, S.Universität zu Köln,University of Cologne (author)
  • Schmidt, M.Polish Academy of Sciences (author)
  • Teyssier, D.European Space Astronomy Centre (ESAC) (author)
  • Vastel, C.Université de Toulouse,University of Toulouse (author)
  • Yu, S.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Dieleman, P.Netherlands Institute for Space Research (SRON) (author)
  • Güsten, R.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Honingh, C. E.Universität zu Köln,University of Cologne (author)
  • Morris, P.California Institute of Technology (Caltech) (author)
  • Roelfsema, P.Netherlands Institute for Space Research (SRON) (author)
  • Schieder, R.Universität zu Köln,University of Cologne (author)
  • Tielens, AggmUniversiteit Leiden (UL),Leiden University (UL) (author)
  • Zmuidzinas, J.California Institute of Technology (Caltech) (author)
  • Tata Institute of Fundamental ResearchUniversität zu Köln (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences521:1, s. Article Number: L13 -0004-63611432-0746

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