Hostname: page-component-745bb68f8f-mzp66 Total loading time: 0 Render date: 2025-01-24T06:57:17.148Z Has data issue: false hasContentIssue false
  • English
  • Français

The Acoustic Cut-Off Frequency of roAp Stars

Published online by Cambridge University Press:  08 February 2017

N. Audard ,
F. Kupka ,
W. W. Weiss ,
P. Morel  and
J. Provost
N. Audard
Affiliation:
Institute of Astronomy, Cambridge, England
F. Kupka
Affiliation:
Institute for Astronomy, Vienna, Austria
W. W. Weiss
Affiliation:
Institute for Astronomy, Vienna, Austria
P. Morel
Affiliation:
Observatoire de la Côte d'Azur, Nice, France
J. Provost
Affiliation:
Observatoire de la Côte d'Azur, Nice, France

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

For 5 out of 28 known rapidly oscillating magnetic chemically peculiar (roAp) stars, the largest observed frequency seems to exceed the theoretical acoustic cutoff frequency, which is determined by the outermost stellar regions. We show that a better modelling of the atmosphere reconciles the theory with the observations for at least the roAp star α Cir.

Type
V. Asteroseismology I
Information
Symposium - International Astronomical Union , Volume 185: New Eyes to See Inside the Sun and Stars , 1998 , pp. 299 - 300
Copyright
Copyright © Kluwer 1998 

References

Audard, N., Kupka, F., Morel, P., Provost, J., Weiss, W.W. (1997) Acoustic cut-off frequency of roAp stars, A&A, acceptedGoogle Scholar
Gough, D.O. 1986, in Hydrodynamic and magnetohydrodynamic problems in the Sun and stars, Ed. Osaki, Y., University of Tokyo press, p. 117 Google Scholar
Morel, P. 1997, CESAM: a code for stellar evolution calculations, A&AS, in press CrossRefGoogle Scholar
Piskunov, N.E., Kupka, F. 1997, A&A, in preparation Google Scholar
Shibahashi, H. 1991, in Challenges to theories of the structure of moderate-mass stars, Eds. Gough, D. & Toomre, J., Lecture Notes in Physics No. 388, Springer-Verlag, p. 393 Google Scholar
Unno, W., Osaki, Y., Ando, H., Saio, H., Shibahashi, H. 1989, Nonradial Oscillations of Stars, University of Tokyo press, 2nd edition Google Scholar
Vorontsov, S.V., Zharkov, V.N., 1989, Astro. Sp. Phy. Rev., vol, 7, part 1 Google Scholar