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Article: Disklike structure in the semiregular pulsating star X Her
Title | Disklike structure in the semiregular pulsating star X Her |
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Authors | |
Keywords | Stars: Imaging Stars: Individual (X Her, Ep Aqr) Stars: Late-Type Stars: Mass Loss |
Issue Date | 2006 |
Publisher | Cambridge 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? |
Abstract | The 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 Identifier | http://hdl.handle.net/10722/175045 |
ISSN | 2023 SCImago Journal Rankings: 0.121 |
References |
DC Field | Value | Language |
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dc.contributor.author | Nakashima, JI | en_US |
dc.date.accessioned | 2012-11-26T08:48:55Z | - |
dc.date.available | 2012-11-26T08:48:55Z | - |
dc.date.issued | 2006 | en_US |
dc.identifier.citation | Proceedings Of The International Astronomical Union, 2006, v. 2 n. 234, p. 477-478 | en_US |
dc.identifier.issn | 1743-9213 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/175045 | - |
dc.description.abstract | The 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.language | eng | en_US |
dc.publisher | Cambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=IAU | en_US |
dc.relation.ispartof | Proceedings of the International Astronomical Union | en_US |
dc.subject | Stars: Imaging | en_US |
dc.subject | Stars: Individual (X Her, Ep Aqr) | en_US |
dc.subject | Stars: Late-Type | en_US |
dc.subject | Stars: Mass Loss | en_US |
dc.title | Disklike structure in the semiregular pulsating star X Her | en_US |
dc.type | Article | en_US |
dc.identifier.email | Nakashima, JI: junichi@hku.hk | en_US |
dc.identifier.authority | Nakashima, JI=rp00764 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1017/S1743921306003826 | en_US |
dc.identifier.scopus | eid_2-s2.0-33845547614 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-33845547614&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 2 | en_US |
dc.identifier.issue | 234 | en_US |
dc.identifier.spage | 477 | en_US |
dc.identifier.epage | 478 | en_US |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Nakashima, JI=35485342300 | en_US |
dc.identifier.issnl | 1743-9213 | - |