[en] Rapid rotation has to date prevented reliable mode identification in most intermediate to massive pulsating stars. In this contribution we show how an asymptotic method for pressure modes predicts regular frequency spacings in the spectrum of rapidly rotating stars. We give a semi-analytical formula for these spacings that is in good agreement with numerically computed high-frequency modes. This should help to extract from observed spectra important information on the structure of rapidly rotating stars.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Pasek, Mickael; Université de Toulouse, CNRS, IRAP ; Laboratoire de Physique Théorique (IRSAMC), Université de Toulouse, CNRS
Georgeot, Bertrand; Laboratoire de Physique Théorique (IRSAMC), Université de Toulouse, CNRS
Lignières, François; Université de Toulouse, CNRS, IRAP
Reese, Daniel ; Observatoire de Paris > Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA)
Language :
English
Title :
Regular Modes in Rapidly Rotating Stars
Publication date :
2013
Event name :
20th Stellar Pulsation Series
Event place :
Granada, Spain
Event date :
from 5-9-2011 to 11-9-2011
Audience :
International
Main work title :
Stellar Pulsations
Main work alternative title :
[en] Impact of New Instrumentation and New Insights
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Bibliography
Babich, V.M., Buldyrev, V.S.: Short-Wavelength Diffraction Theory. Springer, New York (1991)
García Hernández, A., Moya, A., Michel, E., et al.: A&A 506(1), 79–83 (2009)
Gough, D.O.: Linear Adiabatic Stellar Pulsation. In: Zahn, J.-P., Zinn-Justin, J. (eds.) Les Houches Lectures Session XLVIII, p.399. North-Holland, Amsterdam (1993)
Lignières, F., Rieutord, M., Reese, D.R.: A&A 455, 607 (2006)
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