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  • Olofsson, Henrik,1972Chalmers tekniska högskola,Chalmers University of Technology (author)

Odin water mapping in the Orion KL region

  • Article/chapterEnglish2003

Publisher, publication year, extent ...

  • 2003-04-23
  • EDP Sciences,2003
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-30921
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-30921URI
  • https://doi.org/10.1051/0004-6361:20030339DOI
  • https://research.chalmers.se/publication/500656URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

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

Notes

  • New results from water mapping observations of the Orion KL region using the submm/mm wave satellite Odin (2.1\arcmin beam size at 557 GHz), are presented. The ortho-H2O \jkktrans{1}{1}{0}{1}{0}{1} ground state transition was observed in a 7arcminx 7arcmin rectangular grid with a spacing of 1\arcmin, while the same line of H218O was measured in two positions, Orion KL itself and 2\arcmin south of Orion KL. In the main water species, the KL molecular outflow is largely resolved from the ambient cloud and it is found to have an extension of 60\arcsec-110\arcsec. The H2O outflow profile exhibits a rather striking absorption-like asymmetry at the line centre. Self-absorption in the near (or ``blue'') part of the outflow (and possibly in foreground quiescent halo gas) is tentatively suggested to play a role here. We argue that the dominant part of the KL H218O outflow emission emanates from the compact (size ~ 15\arcsec) low-velocity flow and here estimate an H2O abundance of circa 10-5 compared to all H2 in the flow - an order of magnitude below earlier estimates of the H2O abundance in the shocked gas of the high-velocity flow. The narrow ambient cloud lines show weak velocity trends, both in the N-S and E-W directions. H218O is detected for the first time in the southern position at a level of ~ 0.15 K and we here estimate an H2O abundance of (1-8) x 10-8. Odin is a Swedish-led satellite project funded jointly by the Swedish National Space Board (SNSB), the Canadian Space Agency (CSA), the National Technology Agency of Finland (Tekes), and the Centre National d'Études Spatiales (CNES, France). The Swedish Space Corporation (SSC) was the industrial prime contractor and is also responsible for the satellite operation.

Subject headings and genre

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

  • Olofsson, G.Stockholms universitet,Institutionen för astronomi(Swepub:su)olofsson (author)
  • Hjalmarson, Åke,1939Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)akehjalm (author)
  • Bergman, Per,1960Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)pbergman (author)
  • Black, John H,1949Chalmers tekniska högskola,Chalmers University of Technology,Helsingin Yliopisto,University of Helsinki(Swepub:cth)jblack (author)
  • Booth, Roy,1938Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)roy (author)
  • Buat, V. (author)
  • Curry, C. L.University of Waterloo (author)
  • Encrenaz, P. J.Observatoire de Paris,Paris Observatory (author)
  • Falgarone, E.Ecole Normale Superieure (ENS) (author)
  • Feldman, P. (author)
  • Fich, M.University of Waterloo,Saint Mary's University (author)
  • Florén, H. G.Stockholms universitet,Institutionen för astronomi(Swepub:su)flore (author)
  • Frisk, U.Swedish Space Corporation (SSC) (author)
  • Gerin, M.Ecole Normale Superieure (ENS) (author)
  • Gregersen, E. M.McMaster University (author)
  • Harju, J. (author)
  • Hasegawa, T.University of Calgary (author)
  • Johansson, Lars E B,1945Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)lars45 (author)
  • Kwok, S.University of Calgary (author)
  • Larsson, B.Stockholms universitet,Institutionen för astronomi(Swepub:su)bem (author)
  • Lecacheux, A.Observatoire de Paris-Meudon (author)
  • Liljeström, T. (author)
  • Liseau, R.Stockholms universitet,Institutionen för astronomi(Swepub:cth)liseau (author)
  • Mattila, K.Helsingin Yliopisto,University of Helsinki (author)
  • Mitchell, G. F. (author)
  • Nordh, H. L.Stockholms universitet,Institutionen för astronomi,Rymdstyrelsen,Swedish National Space Board(Swepub:su)nordh (author)
  • Olberg, Michael,1956Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)olberg (author)
  • Olofsson, H.Stockholms universitet,Institutionen för astronomi(Swepub:su)olofs (author)
  • Pagani, L.Observatoire de Paris,Paris Observatory (author)
  • Plume, R.University of Calgary (author)
  • Ristorcelli, I. (author)
  • Rydbeck, Gustaf,1942Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)gustafr (author)
  • Sandqvist, Aa.Stockholms universitet,Institutionen för astronomi(Swepub:su)aage (author)
  • von Schéele, F.Swedish Space Corporation (SSC) (author)
  • Serra, G. (author)
  • Tothill, N. F.Saint Mary's University (author)
  • Volk, K.University of Calgary (author)
  • Wilson, C. D.McMaster University (author)
  • Chalmers tekniska högskolaInstitutionen för astronomi (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences402, s. L47-L540004-63611432-0746

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