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  • Wampfler, S. F.Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH) (author)

Herschel observations of the hydroxyl radical (OH) in young stellar objects

  • Article/chapterEnglish2010

Publisher, publication year, extent ...

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

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-51496
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-51496URI
  • https://doi.org/10.1051/0004-6361/201015112DOI
  • https://research.chalmers.se/publication/131376URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

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

Notes

  • Aims: “Water In Star-forming regions with Herschel” (WISH) is a Herschel key program investigating the water chemistry in young stellar objects (YSOs) during protostellar evolution. Hydroxyl (OH) is one of the reactants in the chemical network most closely linked to the formation and destruction of H2O. High-temperature (T ⪆ 250 K) chemistry connects OH and H2O through the OH + H2 Leftrightarrow H2O + H reactions. Formation of H2O from OH is efficient in the high-temperature regime found in shocks and the innermost part of protostellar envelopes. Moreover, in the presence of UV photons, OH can be produced from the photo-dissociation of H2O through H2O + γUV Rightarrow OH + H. Methods: High-resolution spectroscopy of the 163.12 μm triplet of OH towards HH 46 and NGC 1333 IRAS 2A was carried out with the Heterodyne Instrument for the Far Infrared (HIFI) on board the Herschel Space Observatory. The low- and intermediate-mass protostars HH 46, TMR 1, IRAS 15398-3359, DK Cha, NGC 7129 FIRS 2, and NGC 1333 IRAS 2A were observed with the Photodetector Array Camera and Spectrometer (PACS) on Herschel in four transitions of OH and two [O i] lines. Results: The OH transitions at 79, 84, 119, and 163 μm and [O i] emission at 63 and 145 μm were detected with PACS towards the class I low-mass YSOs as well as the intermediate-mass and class I Herbig Ae sources. No OH emission was detected from the class 0 YSO NGC 1333 IRAS 2A, though the 119 μm was detected in absorption. With HIFI, the 163.12 μm was not detected from HH 46 and only tentatively detected from NGC 1333 IRAS 2A. The combination of the PACS and HIFI results for HH 46 constrains the line width (FWHM ⪆ 11 km s-1) and indicates that the OH emission likely originates from shocked gas. This scenario is supported by trends of the OH flux increasing with the [O i] flux and the bolometric luminosity, as found in our sample. Similar OH line ratios for most sources suggest that OH has comparable excitation temperatures despite the different physical properties of the sources. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Appendices (page 6) are only available in electronic form at http://www.aanda.org

Subject headings and genre

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

  • Herczeg, G. J.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Bruderer, S.Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH) (author)
  • Benz, A. O.Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH) (author)
  • van Dishoeck, E. F.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) (author)
  • Kristensen, L. E.Universiteit Leiden (UL),Leiden University (UL) (author)
  • Visser, R.Universiteit Leiden (UL),Leiden University (UL) (author)
  • Doty, S. D.Denison University (author)
  • Melchior, M.University of Applied Sciences Northwestern Switzerland, School of Enginnering,Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH),Universita degli Studi di Roma Tor Vergata,University of Rome Tor Vergata,University of Waterloo,Universiteit Leiden (UL),Leiden University (UL),Netherlands Institute for Space Research (SRON),Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN) (author)
  • van Kempen, T. A.Harvard-Smithsonian Center for Astrophysics (author)
  • Yıldız, U. A.Universiteit Leiden (UL),Leiden University (UL) (author)
  • Dedes, C.Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH) (author)
  • Goicoechea, J. R.Centro de Astrobiologia (CAB) (author)
  • Baudry, A.Institut National des Sciences de l'Univers,Laboratoire d'Astrophysique de Bordeaux (author)
  • Melnick, G.Harvard-Smithsonian Center for Astrophysics (author)
  • Bachiller, R.Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN) (author)
  • Benedettini, M. (author)
  • Bergin, E.University of Michigan (author)
  • Bjerkeli, Per,1977Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)gu97pebj (author)
  • Blake, G. A.California Institute of Technology (Caltech) (author)
  • Bontemps, S.Institut National des Sciences de l'Univers,Laboratoire d'Astrophysique de Bordeaux (author)
  • Braine, J.Laboratoire d'Astrophysique de Bordeaux,Institut National des Sciences de l'Univers (author)
  • Caselli, P.University of Leeds,Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory (author)
  • Cernicharo, J.Centro de Astrobiologia (CAB) (author)
  • Codella, C.Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory,Radboud Universiteit,Radboud University,Anton Pannekoek Institute for Astronomy,University of Waterloo,Western University,Netherlands Institute for Space Research (SRON) (author)
  • Daniel, F.Centro de Astrobiologia (CAB) (author)
  • di Giorgio, A. M. (author)
  • Dominik, C. (author)
  • Encrenaz, P.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Fich, M. (author)
  • Fuente, A.Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN) (author)
  • Giannini, T.Osservatorio Astronomico di Roma (author)
  • de Graauw, Th.Netherlands Institute for Space Research (SRON) (author)
  • Helmich, F.Netherlands Institute for Space Research (SRON) (author)
  • Herpin, F.Institut National des Sciences de l'Univers,Laboratoire d'Astrophysique de Bordeaux (author)
  • Hogerheijde, M. R. (author)
  • Jacq, T.Institut National des Sciences de l'Univers,Laboratoire d'Astrophysique de Bordeaux (author)
  • Johnstone, D.National Research Council Canada,University of Victoria (author)
  • Jørgensen, J. K.Köpenhamns universitet,University of Copenhagen (author)
  • Larsson, BengtStockholms universitet,Institutionen för astronomi,Stockholm University(Swepub:su)bem (author)
  • Lis, D.California Institute of Technology (Caltech) (author)
  • Liseau, René,1949Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)liseau (author)
  • Marseille, M. (author)
  • McCoey, C. (author)
  • Neufeld, D.Johns Hopkins University (author)
  • Nisini, B.Osservatorio Astronomico di Roma (author)
  • Olberg, Michael,1956Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)olberg (author)
  • Parise, B.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Pearson, J. C. (author)
  • Plume, R.University of Calgary,Netherlands Institute for Space Research (SRON) (author)
  • Risacher, C. (author)
  • Santiago-García, J.Institut de Radioastronomie Millimétrique (IRAM) (author)
  • Saraceno, P.Universita degli Studi di Roma Tor Vergata,University of Rome Tor Vergata (author)
  • Shipman, R.Netherlands Institute for Space Research (SRON) (author)
  • Tafalla, M. (author)
  • van der Tak, F. F. S.Netherlands Institute for Space Research (SRON),Rijksuniversiteit Groningen,University of Groningen (author)
  • Wyrowski, F.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Roelfsema, P. (author)
  • Jellema, W.Netherlands Institute for Space Research (SRON) (author)
  • Dieleman, P.Netherlands Institute for Space Research (SRON) (author)
  • Caux, E.Université de Toulouse,University of Toulouse,Institut National des Sciences de l'Univers (author)
  • Stutzki, J.Universität zu Köln,University of Cologne (author)
  • Eidgenössische Technische Hochschule Zürich (ETH)Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG) (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences521, s. L36-0004-63611432-0746

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