MOST detects SPBe pulsations in HD 127756 and HD 217543: asteroseismic rotation rates independent of v sin i[superscript 1]

Show simple item record

dc.creator Guenther, David B.
dc.creator Cameron, Chris
dc.creator Saio, H.
dc.creator Kuschnig, R.
dc.creator Walker, G. A. H.
dc.creator Matthews, J. M.
dc.creator Moffat, A. F. J.
dc.creator Rucinski, S. M.
dc.creator Sasselov, D.
dc.creator Weiss, W. W.
dc.date.accessioned 2014-11-06T15:56:53Z
dc.date.available 2014-11-06T15:56:53Z
dc.date.issued 2008-09
dc.identifier.issn 0004-637X
dc.identifier.issn 1538-4357
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/25903
dc.description Publisher's version/PDF en_CA
dc.description.abstract The MOST (Microvariability and Oscillations of Stars ) satellite has discovered SPBe (slowly pulsating Be) oscillations in the stars HD 127756 (B1/B2 Vne) and HD 217543 (B3 Vpe). For HD 127756, 30 significant frequencies are identified from 31 days of nearly continuous photometry; for HD 217543, up to 40 significant frequencies from 26 days of data. In both cases, the oscillations fall into three distinct frequency ranges, consistent with models of the stars. The variations are caused by nonradial g-modes (and possibly r-modes) distorted by rapid rotation and excited by the opacity mechanism near the iron opacity bump. A comparison of pulsation models and observed frequency groups yields a rotation frequency for each star, independently of v sin i. The rotation rates of these stars, as well as those of the SPBe stars previously discovered by MOST, HD 163868 and [Beta] CMi, are all close to their critical values. en_CA
dc.language.iso en en_CA
dc.publisher American Astronomical Society en_CA
dc.relation.uri http://dx.doi.org/10.1086/590369
dc.rights Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
dc.subject.lcsh Be stars
dc.subject.lcsh Pulsating stars
dc.subject.lcsh Astroseismology
dc.title MOST detects SPBe pulsations in HD 127756 and HD 217543: asteroseismic rotation rates independent of v sin i[superscript 1] en_CA
dc.type Text en_CA
dcterms.bibliographicCitation Astrophysical Journal 685, 489-507. (2008) en_CA


Files in this item


 

Copyright statement:

 
Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
 
Published Version: http://dx.doi.org/10.1086/590369
 
 

This item appears in the following Collection(s)

Show simple item record