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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04715naa a2200805 4500 | |
| 001 | oai:DiVA.org:su-30916 | |
| 003 | SwePub | |
| 008 | 091030s2003 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-309162 URI |
| 024 | 7 | a https://doi.org/10.1051/0004-6361:200303442 DOI |
| 040 | a (SwePub)su | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Pagani, L.4 aut |
| 245 | 1 0 | a Low upper limits on the O2 abundance from the Odin satellite |
| 264 | c 2003-04-23 | |
| 264 | 1 | b EDP Sciences,c 2003 |
| 338 | a print2 rdacarrier | |
| 520 | a For the first time, a search has been conducted in our Galaxy for the 119 GHz transition connecting to the ground state of O2, using the Odin satellite. Equipped with a sensitive 3 mm receiver (Tsys(SSB) = 600 K), Odin has reached unprecedented upper limits on the abundance of O2, especially in cold dark clouds where the excited state levels involved in the 487 GHz transition are not expected to be significantly populated. Here we report upper limits for a dozen sources. In cold dark clouds we improve upon the published SWAS upper limits by more than an order of magnitude, reaching N(O2)/N(H2) <= 10-7 in half of the sources. While standard chemical models are definitively ruled out by these new limits, our results are compatible with several recent studies that derive lower O2 abundances. Goldsmith et al. (\cite{SWAS2002}) recently reported a SWAS tentative detection of the 487 GHz transition of O2 in an outflow wing towards rho Oph A in a combination of 7 beams covering approximately 10arcmin x 14arcmin . In a brief (1.3 hour integration time) and partial covering of the SWAS region (~65% if we exclude their central position), we did not detect the corresponding 119 GHz line. Our 3 sigma upper limit on the O2 column density is 7.3x 1015 cm-2. We presently cannot exclude the possibility that the SWAS signal lies mostly outside of the 9\arcmin Odin beam and has escaped our sensitive detector. 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 was the industrial prime contractor and is operating Odin. | |
| 653 | a radio lines: ISM | |
| 653 | a ISM: molecules | |
| 653 | a Galaxy: abundances | |
| 653 | a Astronomy | |
| 653 | a astronomi | |
| 700 | 1 | a Olofsson, A. O. H.4 aut |
| 700 | 1 | a Bergman, P.4 aut |
| 700 | 1 | a Bernath, P.4 aut |
| 700 | 1 | a Black, J. H.4 aut |
| 700 | 1 | a Booth, R. S.4 aut |
| 700 | 1 | a Buat, V.4 aut |
| 700 | 1 | a Crovisier, J.4 aut |
| 700 | 1 | a Curry, C. L.4 aut |
| 700 | 1 | a Encrenaz, P. J.4 aut |
| 700 | 1 | a Falgarone, E.4 aut |
| 700 | 1 | a Feldman, P. A.4 aut |
| 700 | 1 | a Fich, M.4 aut |
| 700 | 1 | a Floren, H. G.u Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)flore |
| 700 | 1 | a Frisk, U.4 aut |
| 700 | 1 | a Gerin, M.4 aut |
| 700 | 1 | a Gregersen, E. M.4 aut |
| 700 | 1 | a Harju, J.4 aut |
| 700 | 1 | a Hasegawa, T.4 aut |
| 700 | 1 | a Hjalmarson, Å.4 aut |
| 700 | 1 | a Johansson, L. E. B.4 aut |
| 700 | 1 | a Kwok, S.4 aut |
| 700 | 1 | a Larsson, B.u Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)bem |
| 700 | 1 | a Lecacheux, A.4 aut |
| 700 | 1 | a Liljeström, T.4 aut |
| 700 | 1 | a Lindqvist, M.4 aut |
| 700 | 1 | a Liseau, R.u Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)rene |
| 700 | 1 | a Mattila, K.4 aut |
| 700 | 1 | a Mitchell, G. F.4 aut |
| 700 | 1 | a Nordh, L. H.u Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)nordh |
| 700 | 1 | a Olberg, M.4 aut |
| 700 | 1 | a Olofsson, G.u Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)olofsson |
| 700 | 1 | a Ristorcelli, I.4 aut |
| 700 | 1 | a Sandqvist, Aa.u Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)aage |
| 700 | 1 | a von Scheele, F.4 aut |
| 700 | 1 | a Serra, G.4 aut |
| 700 | 1 | a Tothill, N. F.4 aut |
| 700 | 1 | a Volk, K.4 aut |
| 700 | 1 | a Wiklind, T.4 aut |
| 700 | 1 | a Wilson, C. D.4 aut |
| 710 | 2 | a Stockholms universitetb Institutionen för astronomi4 org |
| 773 | 0 | t Astronomy and Astrophysicsd : EDP Sciencesg 402, s. L77-L81q 402<L77-L81x 0004-6361x 1432-0746 |
| 856 | 4 | u https://www.aanda.org/articles/aa/pdf/2003/18/aaODIN11.pdf |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-30916 |
| 856 | 4 8 | u https://doi.org/10.1051/0004-6361:20030344 |
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