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Article: The molecular envelope around the red supergiant VY CMa

TitleThe molecular envelope around the red supergiant VY CMa
Authors
KeywordsCircumstellar Matter
Radio Lines: Stars
Stars: Individual (Vy Canis Majoris)
Supergiants
Issue Date2007
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X
Citation
The Astrophysical Journal, 2007, v. 656 n. 2, p. 1109-1120 How to Cite?
AbstractWe present millimeter interferometric observations of the molecular envelope around the red supergiant VY CMa with the Submillimeter Array (SMA). The high angular resolution (<2′) allows us to derive the structure of the envelope as observed in the 1.3 mm continuum, 12CO(2-1), 13CO(2-1), and SO(6 5-5 4) lines emission. The circumstellar envelope is resolved into three components: (1) a dense, compact, and dusty central component, embedded in (2) a more diffuse and extended envelope, and (3) a high-velocity component. We construct a simple model, consisting of a spherically symmetric slowly expanding envelope and bipolar outflows with a wide opening angle (∼120°) viewed close to the line of sight (i = 15°). Our model can explain the main features of die SMA data and previous single-dish CO multiline observations. An episode of enhanced mass loss along the bipolar direction is inferred from our modeling. The SMA data provide a better understanding of the complicated morphology seen in the optical/IR high-resolution observations. © 2007. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/179703
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorMuller, Sen_US
dc.contributor.authorDinhVTrungen_US
dc.contributor.authorLim, Jen_US
dc.contributor.authorHirano, Nen_US
dc.contributor.authorMuthu, Cen_US
dc.contributor.authorKwok, Sen_US
dc.date.accessioned2012-12-19T10:02:58Z-
dc.date.available2012-12-19T10:02:58Z-
dc.date.issued2007en_US
dc.identifier.citationThe Astrophysical Journal, 2007, v. 656 n. 2, p. 1109-1120en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/179703-
dc.description.abstractWe present millimeter interferometric observations of the molecular envelope around the red supergiant VY CMa with the Submillimeter Array (SMA). The high angular resolution (<2′) allows us to derive the structure of the envelope as observed in the 1.3 mm continuum, 12CO(2-1), 13CO(2-1), and SO(6 5-5 4) lines emission. The circumstellar envelope is resolved into three components: (1) a dense, compact, and dusty central component, embedded in (2) a more diffuse and extended envelope, and (3) a high-velocity component. We construct a simple model, consisting of a spherically symmetric slowly expanding envelope and bipolar outflows with a wide opening angle (∼120°) viewed close to the line of sight (i = 15°). Our model can explain the main features of die SMA data and previous single-dish CO multiline observations. An episode of enhanced mass loss along the bipolar direction is inferred from our modeling. The SMA data provide a better understanding of the complicated morphology seen in the optical/IR high-resolution observations. © 2007. 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/0004-637Xen_US
dc.relation.ispartofThe Astrophysical Journalen_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectCircumstellar Matteren_US
dc.subjectRadio Lines: Starsen_US
dc.subjectStars: Individual (Vy Canis Majoris)en_US
dc.subjectSupergiantsen_US
dc.titleThe molecular envelope around the red supergiant VY CMaen_US
dc.typeArticleen_US
dc.identifier.emailLim, J: jjlim@hku.hken_US
dc.identifier.emailKwok, S: deannote@hku.hken_US
dc.identifier.authorityLim, J=rp00745en_US
dc.identifier.authorityKwok, S=rp00716en_US
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1086/510513en_US
dc.identifier.scopuseid_2-s2.0-33847721787en_US
dc.identifier.hkuros133774-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33847721787&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume656en_US
dc.identifier.issue2en_US
dc.identifier.spage1109en_US
dc.identifier.epage1120en_US
dc.identifier.isiWOS:000244336900043-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridMuller, S=15071043100en_US
dc.identifier.scopusauthoridDinhVTrung=6701469660en_US
dc.identifier.scopusauthoridLim, J=7403453870en_US
dc.identifier.scopusauthoridHirano, N=35769189500en_US
dc.identifier.scopusauthoridMuthu, C=6602324244en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US

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