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The Effects of Time Dependant Convection on White Dwarf Radial Pulsations

  • S. Starrfield (a1) and A. N. Cox (a2)

Abstract

We have investigated the effects of relaxing the normal assumption of frozen in convection on studies of radial instabilities in 0.6M carbon-oxygen white dwarfs with either pure hydrogen layers overlying pure helium layers or 0.6M carbon-oxygen white dwarfs with pure helium surface layers. In this paper we assume that convection can adjust to the pulsation at a rate determined by the time scale of a convective eddy. Using this assumption in our analysis stabilizes most of the modes in both the DA and DB radial instability strips. We also find that the blue edge of the DA radial instability strip, assuming frozen in convection, is between 12,0O0K and 13,000K. The blue edge for the DB radial instability strip (frozen in convection) is between 32,000K and 33,000K.

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Copyright

References

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Bötense, E., Zs. Ap., 46, 108, (1958).
Chanmugam, G., Nature Phys. Sci., 236, 83, (1972).
Cox, A.N., Brownlee, R.R., and Eilers, D.D., Astrophys. J., 144, 1024 (1966).
Cox, A.N., Hodson, S.W., and Starrfield, S., in Nonradial and Nonlinear Stellar Pulsations, ed. Hill, H.A. and Dziembowski, W., Berlin, Springer-Verlag, p. 453, (1980).
Cox, A.N., Starrfield, S., Kidman, R.B., and Pesnell, W.D., Astrophys. J., 317, 303, (1987).
Cox, J.P., and Giuli, R.T., Principles of Stellar Structure, New York, Gordon and Breach, (1968).
Fontaine, G., Tassoul, M., and Wesemael, F., in Proc. 25th Liège Internat. Astrophys. Coll., ed. Noels, A. and Gabriel, M., p. 328, (1984).
Robinson, E.L. Astron. J., 89, 1732, (1984).
Saio, H., and Cox, J.P., Astrophys. J., 236, 549, (1980).
Saio, H., Winget, D.E., and Robinson, E.L., Astrophys. J., 265, 982, (1983).
Starrfield, S., in Stellar Pulsation: A Memorial to John P. Cox, ed. Cox, A.N., Sparks, W.M., and Starrfield, S., Berlin, Springer-Verlag, p. 332, (1987).
Starrfield, S., Cox, A.N., Hodson, S.W., and Clancy, S.P., Astrophys. J., 269, 645, (1983).
Warner, B., and Robinson, E.L., Nature Physical Science, 329, 2, (1972).
Winget, D.E., in Advances in Helio and Asteroseismology ed. Christensen-Dalsgaard, J. and Frandsen, S., Dordrecht, Reidel, p. 305, (1988).
Winget, D.E., van Horn, H.M., and Hansen, C.J., Astrophys. J. Letters, 245, L33, (1981).

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