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Article: W Hya through the eye of Odin satellite observations of circumstellar submillimetre H2O line emission

TitleW Hya through the eye of Odin satellite observations of circumstellar submillimetre H2O line emission
Authors
KeywordsStars: Agb And Post-Agb
Stars: Circumstellar Matter
Stars: Evolution
Stars: Individual: W Hya
Stars: Late-Type
Stars: Mass-Loss
Issue Date2005
PublisherE D P Sciences. The Journal's web site is located at http://www.aanda.org
Citation
Astronomy And Astrophysics, 2005, v. 439 n. 2, p. 627-633 How to Cite?
AbstractWe present Odin observations of the AGB star W Hya in the ground-state transition of ortho-H2O, 110 - l01, at 557 GHz. The line is clearly of circumstellar origin. Radiative transfer modelling of the water lines observed by Odin and ISO results in a mass-loss rate of (2.5 ± 0.5) × 10-7 M yr-1, and a circumstellar H2O abundance of (2.0 ± 1.0) × 10-3. The inferred mass-loss rate is consistent with that obtained from modelling the circumstellar CO radio line emission, and also with that obtained from the dust emission modelling combined with a dynamical model for the outflow. The very high water abundance, higher than the cosmic oxygen abundance, can be explained by invoking an injection of excess water from evaporating icy bodies in the system. The required extra mass of water is quite small, on the order of ∼0.1 M © ESO 2005.
Persistent Identifierhttp://hdl.handle.net/10722/179689
ISSN
2014 Impact Factor: 4.378
2015 SCImago Journal Rankings: 2.446
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorJusttanont, Ken_US
dc.contributor.authorBergman, Pen_US
dc.contributor.authorLarsson, Ben_US
dc.contributor.authorOlofsson, Hen_US
dc.contributor.authorSchöier, FLen_US
dc.contributor.authorFrisk, Uen_US
dc.contributor.authorHasegawa, Ten_US
dc.contributor.authorHjalmarson, Aen_US
dc.contributor.authorKwok, Sen_US
dc.contributor.authorOlberg, Men_US
dc.contributor.authorSandqvist, Aaen_US
dc.contributor.authorVolk, Ken_US
dc.contributor.authorElitzur, Men_US
dc.date.accessioned2012-12-19T10:02:51Z-
dc.date.available2012-12-19T10:02:51Z-
dc.date.issued2005en_US
dc.identifier.citationAstronomy And Astrophysics, 2005, v. 439 n. 2, p. 627-633en_US
dc.identifier.issn0004-6361en_US
dc.identifier.urihttp://hdl.handle.net/10722/179689-
dc.description.abstractWe present Odin observations of the AGB star W Hya in the ground-state transition of ortho-H2O, 110 - l01, at 557 GHz. The line is clearly of circumstellar origin. Radiative transfer modelling of the water lines observed by Odin and ISO results in a mass-loss rate of (2.5 ± 0.5) × 10-7 M yr-1, and a circumstellar H2O abundance of (2.0 ± 1.0) × 10-3. The inferred mass-loss rate is consistent with that obtained from modelling the circumstellar CO radio line emission, and also with that obtained from the dust emission modelling combined with a dynamical model for the outflow. The very high water abundance, higher than the cosmic oxygen abundance, can be explained by invoking an injection of excess water from evaporating icy bodies in the system. The required extra mass of water is quite small, on the order of ∼0.1 M © ESO 2005.en_US
dc.languageengen_US
dc.publisherE D P Sciences. The Journal's web site is located at http://www.aanda.orgen_US
dc.relation.ispartofAstronomy and Astrophysicsen_US
dc.subjectStars: Agb And Post-Agben_US
dc.subjectStars: Circumstellar Matteren_US
dc.subjectStars: Evolutionen_US
dc.subjectStars: Individual: W Hyaen_US
dc.subjectStars: Late-Typeen_US
dc.subjectStars: Mass-Lossen_US
dc.titleW Hya through the eye of Odin satellite observations of circumstellar submillimetre H2O line emissionen_US
dc.typeArticleen_US
dc.identifier.emailKwok, S: deannote@hku.hken_US
dc.identifier.authorityKwok, S=rp00716en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1051/0004-6361:20052969en_US
dc.identifier.scopuseid_2-s2.0-23944435693en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-23944435693&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume439en_US
dc.identifier.issue2en_US
dc.identifier.spage627en_US
dc.identifier.epage633en_US
dc.identifier.isiWOS:000230883900030-
dc.publisher.placeFranceen_US
dc.identifier.scopusauthoridJusttanont, K=6701597318en_US
dc.identifier.scopusauthoridBergman, P=7006615192en_US
dc.identifier.scopusauthoridLarsson, B=7202678664en_US
dc.identifier.scopusauthoridOlofsson, H=7004294995en_US
dc.identifier.scopusauthoridSchöier, FL=6603684180en_US
dc.identifier.scopusauthoridFrisk, U=8966521600en_US
dc.identifier.scopusauthoridHasegawa, T=7404173711en_US
dc.identifier.scopusauthoridHjalmarson, A=15744175200en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US
dc.identifier.scopusauthoridOlberg, M=16201342800en_US
dc.identifier.scopusauthoridSandqvist, Aa=35451841800en_US
dc.identifier.scopusauthoridVolk, K=7006571965en_US
dc.identifier.scopusauthoridElitzur, M=7004349437en_US

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