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Water cooling of sh...
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Nisini, B.Osservatorio Astronomico di Roma
(author)
Water cooling of shocks in protostellar outflows. Herschel-PACS map of L1157
- Article/chapterEnglish2010
Publisher, publication year, extent ...
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2010-07-16
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EDP Sciences,2010
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:su-51504
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-51504URI
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https://doi.org/10.1051/0004-6361/201014603DOI
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https://research.chalmers.se/publication/130254URI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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authorCount :65
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Context. The far-IR/sub-mm spectral mapping facility provided by the Herschel-PACS and HIFI instruments has made it possible to obtain, for the first time, images of H2O emission with a spatial resolution comparable to ground based mm/sub-mm observations. Aims: In the framework of the Water In Star-forming regions with Herschel (WISH) key program, maps in water lines of several outflows from young stars are being obtained, to study the water production in shocks and its role in the outflow cooling. This paper reports the first results of this program, presenting a PACS map of the o-H2O 179 μm transition obtained toward the young outflow L1157. Methods: The 179 μm map is compared with those of other important shock tracers, and with previous single-pointing ISO, SWAS, and Odin water observations of the same source that allow us to constrain the H2O abundance and total cooling. Results: Strong H2O peaks are localized on both shocked emission knots and the central source position. The H2O 179 μm emission is spatially correlated with emission from H2 rotational lines, excited in shocks leading to a significant enhancement of the water abundance. Water emission peaks along the outflow also correlate with peaks of other shock-produced molecular species, such as SiO and NH3. A strong H2O peak is also observed at the location of the proto-star, where none of the other molecules have significant emission. The absolute 179 μm intensity and its intensity ratio to the H2O 557 GHz line previously observed with Odin/SWAS indicate that the water emission originates in warm compact clumps, spatially unresolved by PACS, having a H2O abundance of the order of 10-4. This testifies that the clumps have been heated for a time long enough to allow the conversion of almost all the available gas-phase oxygen into water. The total H2O cooling is ~10-1 L_ȯ, about 40% of the cooling due to H2 and 23% of the total energy released in shocks along the L1157 outflow. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important partecipation from NASA.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Benedettini, M.
(author)
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Codella, C.Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory,Anton Pannekoek Institute for Astronomy,Radboud Universiteit,Radboud University,University of Waterloo,Netherlands Institute for Space Research (SRON)
(author)
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Giannini, T.Osservatorio Astronomico di Roma
(author)
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Liseau, René,1949Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)liseau
(author)
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Neufeld, D.Johns Hopkins University
(author)
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Tafalla, M.Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
(author)
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van Dishoeck, E. F.Universiteit Leiden (UL),Leiden University (UL),Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
(author)
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Bachiller, R.Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
(author)
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Baudry, A.Laboratoire d'Astrophysique de Bordeaux
(author)
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Benz, A. O.Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH)
(author)
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Bergin, E.University of Michigan
(author)
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Bjerkeli, Per,1977Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)gu97pebj
(author)
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Blake, G.California Institute of Technology (Caltech)
(author)
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Bontemps, S.Laboratoire d'Astrophysique de Bordeaux
(author)
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Braine, J.Laboratoire d'Astrophysique de Bordeaux
(author)
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Bruderer, S.Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH)
(author)
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Caselli, P.Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory,University of Leeds
(author)
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Cernicharo, J.Centro de Astrobiologia (CAB)
(author)
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Daniel, F.Centro de Astrobiologia (CAB)
(author)
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Encrenaz, P.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France
(author)
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di Giorgio, A. M.Netherlands Institute for Space Research (SRON)
(author)
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Dominik, C.
(author)
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Doty, S.Denison University
(author)
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Fich, M.University of Waterloo
(author)
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Fuente, A.Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
(author)
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Goicoechea, J. R.Centro de Astrobiologia (CAB)
(author)
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de Graauw, Th.Netherlands Institute for Space Research (SRON)
(author)
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Helmich, F.Netherlands Institute for Space Research (SRON)
(author)
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Herczeg, G.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
(author)
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Herpin, F.Laboratoire d'Astrophysique de Bordeaux
(author)
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Hogerheijde, M.Universiteit Leiden (UL),Leiden University (UL)
(author)
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Jacq, T.Laboratoire d'Astrophysique de Bordeaux
(author)
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Johnstone, D.National Research Council Canada,University of Victoria,Laboratoire d'Astrophysique de Bordeaux
(author)
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Jørgensen, J.Köpenhamns universitet,University of Copenhagen,Harvard-Smithsonian Center for Astrophysics,Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN),University of Calgary
(author)
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Kaufman, M.San Jose State University
(author)
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Kristensen, L.Universiteit Leiden (UL),Leiden University (UL)
(author)
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Larsson, BengtStockholms universitet,Institutionen för astronomi,Stockholm University(Swepub:su)bem
(author)
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Lis, D.California Institute of Technology (Caltech)
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Marseille, M.
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McCoey, C.
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Melnick, G.
(author)
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Olberg, Michael,1956Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)olberg
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Parise, B.Stockholms universitet,Institutionen för astronomi,Stockholm University
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Pearson, J.
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Plume, R.University of Calgary
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Risacher, C.
(author)
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Santiago, J.
(author)
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Saraceno, P.
(author)
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Shipman, R.Netherlands Institute for Space Research (SRON)
(author)
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van Kempen, T. A.Harvard-Smithsonian Center for Astrophysics
(author)
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Visser, R.Universiteit Leiden (UL),Leiden University (UL)
(author)
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Viti, S.University College London (UCL)
(author)
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Wampfler, S.Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH)
(author)
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Wyrowski, F.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
(author)
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van der Tak, F.Netherlands Institute for Space Research (SRON),Rijksuniversiteit Groningen,University of Groningen
(author)
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Yıldız, U. A.Universiteit Leiden (UL),Leiden University (UL)
(author)
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Delforge, B.Ecole Normale Superieure (ENS),Radboud Universiteit,Radboud University
(author)
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Desbat, J.
(author)
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Hatch, W. A.University of Calgary
(author)
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Péron, I.Radboud Universiteit,Radboud University,Ecole Normale Superieure (ENS),Institut de Radioastronomie Millimétrique (IRAM)
(author)
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Schieder, R.Universität zu Köln,University of Cologne
(author)
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Stern, J. A.
(author)
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Teyssier, D.European Space Astronomy Centre (ESAC)
(author)
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Whyborn, N.
(author)
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Osservatorio Astronomico di RomaOsservatorio Astrofisico di Arcetri
(creator_code:org_t)
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In:Astronomy and Astrophysics: EDP Sciences518, s. L120-0004-63611432-0746
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- By the author/editor
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Nisini, B.
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Benedettini, M.
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Codella, C.
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Giannini, T.
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Liseau, René, 19 ...
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Neufeld, D.
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show more...
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Tafalla, M.
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van Dishoeck, E. ...
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Bachiller, R.
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Baudry, A.
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Benz, A. O.
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Bergin, E.
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Bjerkeli, Per, 1 ...
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Blake, G.
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Bontemps, S.
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Braine, J.
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Bruderer, S.
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Caselli, P.
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Cernicharo, J.
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Daniel, F.
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Encrenaz, P.
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di Giorgio, A. M ...
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Dominik, C.
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Doty, S.
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Fich, M.
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Fuente, A.
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Goicoechea, J. R ...
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de Graauw, Th.
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Helmich, F.
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Herczeg, G.
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Herpin, F.
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Hogerheijde, M.
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Jacq, T.
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Johnstone, D.
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Jørgensen, J.
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Kaufman, M.
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Kristensen, L.
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Larsson, Bengt
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Lis, D.
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Marseille, M.
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McCoey, C.
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Melnick, G.
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Olberg, Michael, ...
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Parise, B.
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Pearson, J.
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Plume, R.
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Risacher, C.
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Santiago, J.
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Saraceno, P.
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Shipman, R.
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van Kempen, T. A ...
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Visser, R.
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Viti, S.
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Wampfler, S.
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Wyrowski, F.
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van der Tak, F.
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Yıldız, U. A.
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Delforge, B.
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Desbat, J.
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Hatch, W. A.
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Péron, I.
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Schieder, R.
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Stern, J. A.
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Teyssier, D.
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Whyborn, N.
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