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Sökning: WFRF:(Wallström P.) > ATOMIUM: Probing th...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00009098naa a2200865 4500
001oai:gup.ub.gu.se/329827
003SwePub
008240528s2023 | |||||||||||000 ||eng|
009oai:research.chalmers.se:6891c600-2931-4ece-9add-2c23f74b75d7
009oai:DiVA.org:uu-509145
0247 a https://gup.ub.gu.se/publication/3298272 URI
0247 a https://doi.org/10.1051/0004-6361/2022451932 DOI
0247 a https://research.chalmers.se/publication/5366502 URI
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5091452 URI
040 a (SwePub)gud (SwePub)cthd (SwePub)uu
041 a eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Baudry, A.u Laboratoire d'Astrophysique de Bordeaux,Univ Bordeaux, Lab Astrophys Bordeaux, CNRS, B18N allee Geoffroy St Hilaire, F-33615 Pessac, France.4 aut
2451 0a ATOMIUM: Probing the inner wind of evolved O-rich stars with new, highly excited H2O and OH lines
264 1b EDP Sciences,c 2023
520 a Context. Water (H2O) and the hydroxyl radical (OH) are major constituents of the envelope of O-rich late-type stars. Transitions involving energy levels that are rotationally or vibrationally highly excited (energies & GSIM;4000 K) have been observed in both H2O and OH. These and more recently discovered transitions can now be observed at a high sensitivity and angular resolution in the inner wind close to the stellar photosphere with the Atacama Large Millimeter/submillimeter Array (ALMA). Aims. Our goals are: (1) to identify and map the emission and absorption of H2O in several vibrational states, and of OH in Lambda-doubling transitions with similar excitation energies; and (2) to determine the physical conditions and kinematics in gas layers close to the extended atmosphere in a sample of asymptotic giant branch stars (AGBs) and red supergiants (RSGs). Methods. Spectra and maps of H2O and OH lines observed in a 27 GHz aggregated bandwidth and with an angular resolution of similar to 0."02-1."0 were obtained at two epochs with the main ALMA array. Additional observations with the Atacama Compact Array (ACA) were used to check for time variability of water transitions. Radiative transfer models of H2O were revisited to characterize masing conditions. Up-to-date chemical models were used for comparison with the observed OH/H2O abundance ratio. Results. Ten rotational transitions of H2O with excitation energies similar to 4000-9000 K were observed in vibrational states up to (& upsilon;(1),& upsilon;(2),& upsilon;(3)) = (0,1,1). All but one are new detections in space, and from these we have derived accurate rest frequencies. Hyperfine split Lambda-doubling transitions in & upsilon; = 0, J = 27/2 and 29/2 levels of the (2)& pi;(3/2) state, as well as J = 33/2 and 35/2 of the (2)& pi;(1/2) state of OH with excitation energies of similar to 4780-8900 K were also observed. Four of these transitions are new detections in space. Combining our measurements with earlier observations of OH, the & upsilon; = 0 and & upsilon; = 1 Lambda-doubling frequencies have been improved. Our H2O maps show compact emission toward the central star and extensions up to twelve stellar radii or more. The 268.149 GHz emission line of water in the & upsilon;(2) = 2 state is time variable, tends to be masing with dominant radiative pumping, and is widely excited in AGBs and RSGs. The widespread but weaker 262.898 GHz water line in the & upsilon;(2) = 1 state also shows signs of maser emission. The OH emission is weak and quasithermally excited. Emission and absorption features of H2O and OH reveal an infall of matter and complex kinematics influenced by binarity. From the OH and H2O column densities derived with nonmasing transitions in a few sources, we obtain OH/H2O abundance ratios of similar to(0.7-2.8) x 10(-2).
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
650 7a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng
653 a stars: AGB and post-AGB
653 a supergiants
653 a circumstellar matter
653 a line:
653 a identification
653 a instrumentation: interferometers
653 a masers
653 a vy canis majoris
653 a nonlocal radiative-transfer
653 a sio maser emission
653 a giant
653 a branch stars
653 a water-vapor
653 a agb stars
653 a infrared-spectroscopy
653 a mira
653 a variables
653 a oxygen-rich
653 a circumstellar envelopes
653 a Astronomy & Astrophysics
653 a Supergiants
7001 a Khouri, Theo,d 1985u Uppsala universitet,Institutionen för fysik och astronomi,Inst Radioastron Millimetr, 300 rue Piscine, F-38406 St Martin Dheres, France.,Chalmers Univ Technol, Onsala Space Observ, S-43992 Onsala, Sweden.4 aut0 (Swepub:uu)katwo962
7001 a Etoka, S.u University of Manchester,Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, England.4 aut
7001 a Richards, A. M. S.u University of Manchester,LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique,Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, England.,Univ Paris 05, LESIA, Observ Paris, CNRS, 5 Pl Jules Janssen, F-92195 Meudon, France.4 aut
7001 a Mueller, H. S. P.u Universität zu Köln,University of Cologne,Univ Cologne, Phys Inst 1, D-50937 Cologne, Germany.4 aut
7001 a Herpin, F.u Laboratoire d'Astrophysique de Bordeaux,Univ Bordeaux, Lab Astrophys Bordeaux, CNRS, B18N allee Geoffroy St Hilaire, F-33615 Pessac, France.4 aut
7001 a Danilovich, Taissa,d 1987u Katholieke Universiteit Leuven,Monash University,Katholieke Univ Leuven, Inst Astron, Celestijnenlaan 200D, B-3001 Leuven, Belgium.;Monash Univ, Sch Phys & Astron, Wellington Rd, Clayton, Vic 3800, Australia.4 aut0 (Swepub:cth)taissa
7001 a Gray, M. D.u University of Manchester,Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, England.;Natl Astron Res Inst Thailand, 260 Moo 4, Chiangmai 50180, Thailand.4 aut
7001 a Wallström, Sofia,d 1988u Katholieke Universiteit Leuven,Katholieke Univ Leuven, Inst Astron, Celestijnenlaan 200D, B-3001 Leuven, Belgium.4 aut0 (Swepub:cth)wallstrs
7001 a Gobrecht, Davidu Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg,Katholieke Universiteit Leuven,Katholieke Univ Leuven, Inst Astron, Celestijnenlaan 200D, B-3001 Leuven, Belgium.;Univ Gothenburg, Dept Chem & Mol Biol, S-40530 Gothenburg, Sweden.4 aut0 (Swepub:gu)xgobda
7001 a Khouri, T.4 aut
7001 a Decin, L.u Katholieke Universiteit Leuven,Katholieke Univ Leuven, Inst Astron, Celestijnenlaan 200D, B-3001 Leuven, Belgium.4 aut
7001 a Gottlieb, C. A.u Harvard-Smithsonian Center for Astrophysics,Harvard Smithsonian Ctr Astrophys, Cambride, MA 02138 USA.4 aut
7001 a Menten, K. M.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Max Planck Inst Radioastron, D-53121 Bonn, Germany.4 aut
7001 a Homan, W.u Katholieke Universiteit Leuven,Katholieke Univ Leuven, Inst Astron, Celestijnenlaan 200D, B-3001 Leuven, Belgium.4 aut
7001 a Millar, T. J.u Queen's University Belfast,Queens Univ Belfast, Astrophys Res Ctr, Sch Math & Phys, Univ Rd, Belfast BT7 1NN, North Ireland.4 aut
7001 a Montarges, M.u University of Leeds,Univ Leeds, Sch Chem, Leeds LS2 9JT, England.4 aut
7001 a Pimpanuwat, B.u University of Manchester,Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, England.4 aut
7001 a Plane, J. M. C.4 aut
7001 a Kervella, P.u LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique,Univ Paris 05, LESIA, Observ Paris, CNRS, 5 Pl Jules Janssen, F-92195 Meudon, France.4 aut
7102 a Laboratoire d'Astrophysique de Bordeauxb Univ Bordeaux, Lab Astrophys Bordeaux, CNRS, B18N allee Geoffroy St Hilaire, F-33615 Pessac, France.4 org
7730 t Astronomy & Astrophysicsd : EDP Sciencesg 674q 674x 0004-6361x 1432-0746
8564 u https://research.chalmers.se/publication/536650/file/536650_Fulltext.pdfx primaryx freey FULLTEXT
8564 u https://uu.diva-portal.org/smash/get/diva2:1788606/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print
8564 8u https://gup.ub.gu.se/publication/329827
8564 8u https://doi.org/10.1051/0004-6361/202245193
8564 8u https://research.chalmers.se/publication/536650
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-509145

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