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Article: A biconically expanding flow in W43A traced by SiO maser emission

TitleA biconically expanding flow in W43A traced by SiO maser emission
Authors
KeywordsMasers
Stars: Agb And Post-Agb
Stars: Individual (W43a)
Stars: Mass Loss
Stars: Winds, Outflows
Issue Date2005
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2005, v. 622 n. 2 II, p. L125-L128 How to Cite?
AbstractWe report Very Long Baseline Array and Very Large Array observations of 22 GHz H 2O and 43 GHz SiO (v = 1, J = 1-0) maser emission as well as 7 mm continuum emission in W43A, which exhibits a highly collimated jet of molecular gas and a spherically expanding envelope very similar to that of an OH/IR star. The spatiokinematical structure of the H 2O masers is well fitted to a precessing jet model with an expansion velocity of 150 km s -1 and a dynamical age of ∼50 yr. The spatiokinematical structure of the SiO masers is well fitted to a biconically expanding flow model, whose axis is parallel to the direction of the collimated jet. Astrometry of the H 2O and SiO masers suggests that these maser sources have a common dynamical center, possibly as part of a binary system, within 70 AU. The SiO masers may be excited on the surface of the cone that has significant deceleration and interacts with the jet. A 7 mm continuum emission source is located ∼1300 AU away from these maser sources at a position angle of about -60° from the jet axis. The physical relation of the continuum to the maser sources is still unclear. © 2005. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/174947
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorImai, Hen_US
dc.contributor.authorNakashima, JIen_US
dc.contributor.authorDiamond, PJen_US
dc.contributor.authorMiyazaki, Aen_US
dc.contributor.authorDeguchi, Sen_US
dc.date.accessioned2012-11-26T08:48:18Z-
dc.date.available2012-11-26T08:48:18Z-
dc.date.issued2005en_US
dc.identifier.citationAstrophysical Journal Letters, 2005, v. 622 n. 2 II, p. L125-L128en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/174947-
dc.description.abstractWe report Very Long Baseline Array and Very Large Array observations of 22 GHz H 2O and 43 GHz SiO (v = 1, J = 1-0) maser emission as well as 7 mm continuum emission in W43A, which exhibits a highly collimated jet of molecular gas and a spherically expanding envelope very similar to that of an OH/IR star. The spatiokinematical structure of the H 2O masers is well fitted to a precessing jet model with an expansion velocity of 150 km s -1 and a dynamical age of ∼50 yr. The spatiokinematical structure of the SiO masers is well fitted to a biconically expanding flow model, whose axis is parallel to the direction of the collimated jet. Astrometry of the H 2O and SiO masers suggests that these maser sources have a common dynamical center, possibly as part of a binary system, within 70 AU. The SiO masers may be excited on the surface of the cone that has significant deceleration and interacts with the jet. A 7 mm continuum emission source is located ∼1300 AU away from these maser sources at a position angle of about -60° from the jet axis. The physical relation of the continuum to the maser sources is still unclear. © 2005. The American Astronomical Society. All rights reserved.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_US
dc.relation.ispartofAstrophysical Journal Lettersen_US
dc.subjectMasersen_US
dc.subjectStars: Agb And Post-Agben_US
dc.subjectStars: Individual (W43a)en_US
dc.subjectStars: Mass Lossen_US
dc.subjectStars: Winds, Outflowsen_US
dc.titleA biconically expanding flow in W43A traced by SiO maser emissionen_US
dc.typeArticleen_US
dc.identifier.emailNakashima, JI: junichi@hku.hken_US
dc.identifier.authorityNakashima, JI=rp00764en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1086/429820en_US
dc.identifier.scopuseid_2-s2.0-19844370077en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-19844370077&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume622en_US
dc.identifier.issue2 IIen_US
dc.identifier.spageL125en_US
dc.identifier.epageL128en_US
dc.identifier.isiWOS:000228093800013-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridImai, H=35484255500en_US
dc.identifier.scopusauthoridNakashima, JI=35485342300en_US
dc.identifier.scopusauthoridDiamond, PJ=7102763138en_US
dc.identifier.scopusauthoridMiyazaki, A=7201588306en_US
dc.identifier.scopusauthoridDeguchi, S=7006314159en_US

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