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First NH3 detection of the Orion Bar
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi.
Vise andre og tillknytning
2003 (engelsk)Inngår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 402, s. L69-L72Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Odin has successfully observed three regions in the Orion A cloud, i.e. Ori KL, Ori S and the Orion Bar, in the 572.5 GHz rotational ground state line of ammonia, ortho-NH3 (J,K) = (1,0) -> (0,0), and the result for the Orion Bar represents the first detection in an ammonia line. Several velocity components are present in the data. Specifically, the observed line profile from the Orion Bar can be decomposed into two components, which are in agreement with observations in high-J CO lines by Wilson et al. (\cite{wilson01}). Using the source model for the Orion Bar by these authors, our Odin observation implies a total ammonia abundance of NH3/H2 = 5x 10-9. Based on observations with Odin, 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 Centre National d'Études Spatiales (CNES). The Swedish Space Corporation has been the industrial prime contractor.

sted, utgiver, år, opplag, sider
2003. Vol. 402, s. L69-L72
Emneord [en]
ISM: individual objects: Orion A, clouds, molecules, abundances, stars: formation
Forskningsprogram
astronomi
Identifikatorer
URN: urn:nbn:se:su:diva-30918DOI: 10.1051/0004-6361:20030342OAI: oai:DiVA.org:su-30918DiVA, id: diva2:274760
Tilgjengelig fra: 2009-10-31 Laget: 2009-10-30 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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Larsson, B.Liseau, R.Florén, H. G.Nordh, L. H.Olofsson, G.Sandqvist, Aa.
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