Hostname: page-component-745bb68f8f-d8cs5 Total loading time: 0 Render date: 2025-02-03T11:59:54.842Z Has data issue: false hasContentIssue false
  • English
  • Français

Problems with the Pulsation Mode Selection Mechanism in the Lower Instability Strip (Observations and Theory)

Published online by Cambridge University Press:  12 April 2016

M. Breger  and
A.A. Pamyatnykh
M. Breger
Affiliation:
Institut für Astronomie, Universität Wien, Türkenschanzstr. 17, A-1180 Wien, Austria; email:[email protected]
A.A. Pamyatnykh
Affiliation:
Institut für Astronomie, Universität Wien, Türkenschanzstr. 17, A-1180 Wien, Austria; email:[email protected] Copernicus Astronomical Center, Bartycka 18, 00-716 Warsaw, Poland; email:[email protected] Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya 48, 109017 Moscow, Russia

Abstract

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.

We examine the severe disagreement between the number of predicted and observed pulsation modes for δ Scuti stars. The selection of nonradial modes trapped in the outer envelope is considered on the basis of kinetic energy arguments. The trapped l = 1 modes for the star 4 CVn are in good, but not perfect agreement with the observations. The trapping of the l = 2 modes is weaker, so that this simple rule of mode selection may apply to l = 1, and possibly not to l = 2 modes.

Type
Part 3. Nonlinear Effects in Pulsating Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 388 - 391
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

Breger, M., Handler, G., Garrido, R., et al. 1999, A&A, 349, 225 Google Scholar
Dziembowski, W.A. 1997, in Sounding solar and stellar interiors, eds. Provost, J. & Schmieder, F.-X., (Kluwer, Dordrecht), 317 CrossRefGoogle Scholar
Dziembowski, W.A. & Cassisi, S. 1999, Acta Astron., 49, 371 Google Scholar
Dziembowski, W. & Królikowska, M. 1990, Acta Astron., 40, 19 Google Scholar
Pamyatnykh, A.A., Dziembowski, W.A., Handler, G., & Pikall, H. 1998, A&A, 333, 141 Google Scholar