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Article: Tracing the asymmetry in the envelope around the carbon star cit 6

TitleTracing the asymmetry in the envelope around the carbon star cit 6
Authors
KeywordsCircumstellar Matter
Ism: Molecules
Stars: Agb And Post-Agb
Stars: Individual (Cit 6)
Stars: Mass Loss
Issue Date2009
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2009, v. 701 n. 1, p. 292-297 How to Cite?
AbstractWe present high angular resolution observations of HC3N J = 5 - 4 line and 7 mm continuum emission from the extreme carbon star CIT 6. We find that the 7 mm continuum emission is unresolved and has a flux consistent with blackbody thermal radiation from the central star. The HC3N J = 5 - 4 line emission originates from an asymmetric and clumpy expanding envelope comprising two separate shells of HC3N J = 5 - 4 emission: (1) a faint outer shell that is nearly spherical which has a radius of 8″ and (2) a thick and incomplete inner shell that resembles a one-arm spiral starting at or close to the central star and extending out to a radius of about 5″. A comparison between the data and our excitation modeling results suggests an unusually high abundance of HC3N in the envelope of CIT 6. We discuss the possibility that the envelope might be shaped by the presence of a previously suggested possible binary companion. The abundance of HC3N may be enhanced in spiral shocks produced by the interaction between the circumstellar envelope of CIT 6 and its companion star. © 2009 The American Astronomical Society.
Persistent Identifierhttp://hdl.handle.net/10722/175166
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorDinhVTrungen_US
dc.contributor.authorLim, Jen_US
dc.date.accessioned2012-11-26T08:49:31Z-
dc.date.available2012-11-26T08:49:31Z-
dc.date.issued2009en_US
dc.identifier.citationAstrophysical Journal Letters, 2009, v. 701 n. 1, p. 292-297en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/175166-
dc.description.abstractWe present high angular resolution observations of HC3N J = 5 - 4 line and 7 mm continuum emission from the extreme carbon star CIT 6. We find that the 7 mm continuum emission is unresolved and has a flux consistent with blackbody thermal radiation from the central star. The HC3N J = 5 - 4 line emission originates from an asymmetric and clumpy expanding envelope comprising two separate shells of HC3N J = 5 - 4 emission: (1) a faint outer shell that is nearly spherical which has a radius of 8″ and (2) a thick and incomplete inner shell that resembles a one-arm spiral starting at or close to the central star and extending out to a radius of about 5″. A comparison between the data and our excitation modeling results suggests an unusually high abundance of HC3N in the envelope of CIT 6. We discuss the possibility that the envelope might be shaped by the presence of a previously suggested possible binary companion. The abundance of HC3N may be enhanced in spiral shocks produced by the interaction between the circumstellar envelope of CIT 6 and its companion star. © 2009 The American Astronomical Society.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.subjectCircumstellar Matteren_US
dc.subjectIsm: Moleculesen_US
dc.subjectStars: Agb And Post-Agben_US
dc.subjectStars: Individual (Cit 6)en_US
dc.subjectStars: Mass Lossen_US
dc.titleTracing the asymmetry in the envelope around the carbon star cit 6en_US
dc.typeArticleen_US
dc.identifier.emailLim, J: jjlim@hku.hken_US
dc.identifier.authorityLim, J=rp00745en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/0004-637X/701/1/292en_US
dc.identifier.scopuseid_2-s2.0-70449864099en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70449864099&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume701en_US
dc.identifier.issue1en_US
dc.identifier.spage292en_US
dc.identifier.epage297en_US
dc.identifier.isiWOS:000268341800025-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridDinhVTrung=15520778600en_US
dc.identifier.scopusauthoridLim, J=7403453870en_US

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