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Article: Disklike structure in the semiregular pulsating star X Her

TitleDisklike structure in the semiregular pulsating star X Her
Authors
KeywordsStars: Imaging
Stars: Individual (X Her, Ep Aqr)
Stars: Late-Type
Stars: Mass Loss
Issue Date2006
PublisherCambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=IAU
Citation
Proceedings Of The International Astronomical Union, 2006, v. 2 n. 234, p. 477-478 How to Cite?
AbstractThe author presents the results of Berkeley-Illinois-Maryland (BIMA) array interferometric observations in the CO J = 1-0 line toward X Her and EP Aqr, semiregular pulsating stars with a composite CO line profile, and also reports finding a disklike structure in X Her. In the CO spectrum both of X Her and EP Aqr, a composite profile including narrow and broad components is seen as reported by the previous single-dish observations. The spatial structure of the broad component region of X Her shows a bipolar shape, and that of the narrow component shows an elliptical/spherical shape. The blue- and red-shifted parts of the X Her narrow component show a systematic difference in the velocity integrated intensity map. The spatio-kinematic properties of the X Her narrow component are reminiscent of a Keplerian rotating disk with a central mass of 0.9 M⊙. The spatial distributions of both the narrow and the broad components of EP Aqr appear to be roughly round with the same peak positions; no significant velocity gradient is seen. The spatio-kinematic properties of EP Aqr are reminiscent of a multiple-shell structure model rather than of a bipolar flow and disk model. © 2006 International Astronomical Union.
Persistent Identifierhttp://hdl.handle.net/10722/175045
ISSN
2015 SCImago Journal Rankings: 0.105
References

 

DC FieldValueLanguage
dc.contributor.authorNakashima, JIen_US
dc.date.accessioned2012-11-26T08:48:55Z-
dc.date.available2012-11-26T08:48:55Z-
dc.date.issued2006en_US
dc.identifier.citationProceedings Of The International Astronomical Union, 2006, v. 2 n. 234, p. 477-478en_US
dc.identifier.issn1743-9213en_US
dc.identifier.urihttp://hdl.handle.net/10722/175045-
dc.description.abstractThe author presents the results of Berkeley-Illinois-Maryland (BIMA) array interferometric observations in the CO J = 1-0 line toward X Her and EP Aqr, semiregular pulsating stars with a composite CO line profile, and also reports finding a disklike structure in X Her. In the CO spectrum both of X Her and EP Aqr, a composite profile including narrow and broad components is seen as reported by the previous single-dish observations. The spatial structure of the broad component region of X Her shows a bipolar shape, and that of the narrow component shows an elliptical/spherical shape. The blue- and red-shifted parts of the X Her narrow component show a systematic difference in the velocity integrated intensity map. The spatio-kinematic properties of the X Her narrow component are reminiscent of a Keplerian rotating disk with a central mass of 0.9 M⊙. The spatial distributions of both the narrow and the broad components of EP Aqr appear to be roughly round with the same peak positions; no significant velocity gradient is seen. The spatio-kinematic properties of EP Aqr are reminiscent of a multiple-shell structure model rather than of a bipolar flow and disk model. © 2006 International Astronomical Union.en_US
dc.languageengen_US
dc.publisherCambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=IAUen_US
dc.relation.ispartofProceedings of the International Astronomical Unionen_US
dc.subjectStars: Imagingen_US
dc.subjectStars: Individual (X Her, Ep Aqr)en_US
dc.subjectStars: Late-Typeen_US
dc.subjectStars: Mass Lossen_US
dc.titleDisklike structure in the semiregular pulsating star X Heren_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.doi10.1017/S1743921306003826en_US
dc.identifier.scopuseid_2-s2.0-33845547614en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33845547614&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume2en_US
dc.identifier.issue234en_US
dc.identifier.spage477en_US
dc.identifier.epage478en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridNakashima, JI=35485342300en_US

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