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Pulsation in Cool Hydrogen Deficient Stars

Published online by Cambridge University Press:  12 April 2016

Holger Pikall
Holger Pikall*
Affiliation:
Institut für Astronomie, Türkenschanzstr. 17, A-1180 Wien, Austria; e-mail:[email protected]

Abstract

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Models for hydrogen deficient stars are presented for different L/M-ratios and temperatures typical for RCB and HdC. Initially, we searched for unstable pulsation modes and identified their character using a simple linear code based on matrix methods. In a second step, we employed our fully-implicit Radiation-Hydro-Dynamics code to obtain amplitudes, radial velocities and lightcurves. For small L/M-ratios, nonlinear periods are close to the linear ones. Cooler models show strong shock-waves, which are suggested to play a key role in the dust formation of RCB stars which will be our ultimate goal.

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. 432 - 435
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

Asplund, M., Gustafsson, B., Lambert, D.L. & Rao, N.K. 2000, A&A, 353, 287 Google Scholar
Clayton, G.C. 2001, Ap&SS, 275, 143 Google Scholar
Dorfi, E.A., 1998, in Saas-Fee Advanced Course 27, Computational Methods for Astrophysical Fluid Flow, eds. Steiner O, O. & Gautschy, A., (Springer-Verlag)Google Scholar
Feuchtinger, M.U. 1998, A&A, 337, 2 Google Scholar
Feuchtinger, M.U. 1999a, A&AS, 136, 217 Google Scholar
Feuchtinger, M.U. 1999b, A&A, 351, 103 Google Scholar
Feuchtinger, M.U., Buchler, J.R., & Kollàth, Z. 2000, ApJ, 544, 1056 Google Scholar
Pandey, G., et al. 2001, MNRAS, 324, 937 CrossRefGoogle Scholar
Saio, H. 1995, MNRAS, 277, 1393 Google Scholar
Saio, H. & Jeffery, C.S. 2000, MNRAS, 313, 671 Google Scholar
Wuchterl, G. 1990, A&A, 238, 83 Google Scholar
Wuchterl, G. & Feuchtinger, M.U. 1998, A&A, 340, 419 Google Scholar