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Asteroseismology of white dwarf stars

Published online by Cambridge University Press:  25 May 2016

G. Vauclair
G. Vauclair*
Affiliation:
Observatoire Midi-Pyrénées, 14, Av. E. Belin 31400 Toulouse, France

Abstract

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The theoretical potential of white dwarf asteroseismology is summarized. It is shown how one can derive fundamental parameters on the internal structure and evolution of these stars. The analysis of the non-radial g-modes permits in principle to determine the total mass, the rotation rate, the magnetic field strength. The mass of the outer layers, left on top of the carbon/oxygen core, can be determined as well as the structure of the transition zone between the core and the outer layers, giving an “a posteriori” unique information on the efficiency of the previous mass loss episodes. When measurable, the rate of change of the pulsation periods gives direct access to the evolutionary time scale and to the chemical composition of the core. These theoretical expectations are compared with the observations of variable white dwarfs in the three known instability strips for the planetary nebulae nuclei and PG1159 stars, for the DB and DA white dwarfs. Emphasis is put on results obtained from multi-sites photometric campaigns. Prospects on both theoretical developments and observations conclude the review.

Type
Part VI: Results on some selected types of stars
Information
Symposium - International Astronomical Union , Volume 181: Sounding Solar and Stellar Interiors , 1997 , pp. 367 - 380
Copyright
Copyright © Kluwer 1997 

References

Appleton, P., Kawaler, S., Eitter, J. (1993) Astron. J. 106, 1973.Google Scholar
Bergeron, P., Wesemael, F., Lamontagne, R., Fontaine, G., Saffer, R.A. and Allard, N.F. (1995) Astrophys. J. 449, 258.Google Scholar
Bond, H.E and Meakes, M.G. (1990) Astron. J., 100, 788.Google Scholar
Bond, H.E. and Ciardullo, R. (1993) in White dwarfs: Advances in Observation and Theory, Barstow, M. (Ed.), Kluwer Academic Publishers, p.491.CrossRefGoogle Scholar
Bond, H.E. (1995) in 3rd WET workshop , Meistas, E. and Solheim, J.-E. (Eds.), Baltic Astronomy 4, p.527.Google Scholar
Bradley, P.A. (1993) , .Google Scholar
Bradley, P.A. (1996) Astrophys. J., 468, 350.Google Scholar
Bradley, P.A. and Dziembowski, W.A. (1996) Astrophys. J., 462, 376.Google Scholar
Brassard, P., Fontaine, G., Wesemael, F. and Hansen, C.J. (1992a) Astrophys. J. Supl., 80, 369.Google Scholar
Brassard, P., Fontaine, G., Wesemael, F. and Tassoul, M. (1992b) Astrophys. J. Supl., 81, 747.Google Scholar
Brassard, P., Fontaine, G. and Wesemael, F. (1995) Astrophys. J. Supl., 96, 545.Google Scholar
Dolez, N., Roques, S., Serre, B. and Vauclair, G. (1997) in Sounding Solar and Stellar Interiors, Provost, J. and Schmider, F.-X. (Eds.) in press.Google Scholar
Dolez, N. and Vauclair, G. (1981) Astron. Astrophys., 102, 375.Google Scholar
Dreizler, S., Werner, K. and Heber, U. (1995) in White Dwarfs Koester, D. and Werner, K. (Eds.), Lecture Notes in Physics 443, Springer, Berlin, p.160.CrossRefGoogle Scholar
Dreizler, S., Werner, K., Heber, U. and Engels, D. (1996) Astron. Astrophys., 309, 820.Google Scholar
Fontaine, G., Bergeron, P., Vauclair, G., Brassard, P., Wesemael, F., Kawaler, S., Grauer, A.D. and Winget, D.E. (1991) Astrophys. J., 378, L49.Google Scholar
Fontaine, G., Brassard, P., Bergeron, P., Wesemael, F., Vauclair, G., Pfeiffer, B. and Dolez, N. (1995) Proceedings of the 4th CFHT User's.Google Scholar
Grauer, A.D. and Bond, H.E. (1984) Astrophys. J., 277, 211.CrossRefGoogle Scholar
Grauer, A.D., Green, R.F. and Liebert, J. (1992) Astrophys. J., 399, 686.Google Scholar
Gautschy, A., Ludwig, H.-G. and Freytag, B. (1996) Astron. Astrophys., 311, 493.Google Scholar
Jones, P.W., Pesnell, W.D., Hansen, C.J. and Kawaler, S.D. (1989) Astrophys. J., 336, 403.Google Scholar
Kanaan, A., Kepler, S.O. and Giovannini, O. (1992) Astrophys. J., 390, L89.Google Scholar
Kawaler, S.D. and Bradley, P.A. (1994) Astrophys. J., 427, 415.Google Scholar
Kawaler, S.D. et al. (1995) Astrophys. J., 450, 350.Google Scholar
Kepler, S.O. et al. (1991) Astrophys. J., 378, L45.Google Scholar
Landolt, A.U. (1968) Astrophys. J., 153, 151.Google Scholar
McGraw, J.T., Starrfield, S.G., Liebert, J. and Green, R.F. (1979) in White Dwarfs and Variable Degenerate Stars, IAU Colloquium 53, Van Horn, H.M. and Weidemann, V. (Eds.), Univ. Rochester Press, p. 377.Google Scholar
Motch, C., Werner, K. and Pakull, M. (1993) Astron. Astrophys., 268, 561.Google Scholar
Nather, R.E., Winget, D.E., Clemens, J.C., Hansen, C.J. and Hine, B.P. (1990) Astrophys. J., 361, 309.Google Scholar
Pfeiffer, B., et al. (1996) Astron. Astrophys., 314, 182.Google Scholar
Robinson, E. L. (1984) Astron. J., 89, 1732.Google Scholar
Saio, H. (1996) in Hydrogen-Deficient Stars, Jeffery, C.S. and Heber, U. (Eds.), ASP Conf. Ser. , 96, p.361.Google Scholar
Stanghellini, L., Cox, A.N. and Starrfield, S.G. (1991) Astrophys. J., 383, 766.Google Scholar
Starrfield, S.G., Cox, A.N., Hodson, S.W. and Pesnell, W.D. (1983) Astrophys. J., 268, L27.CrossRefGoogle Scholar
Starrfield, S.G., Cox, A.N., Kidman, R.B. and Pesnell, (1984) Astrophys. J., 281, 800.Google Scholar
Vauclair, G. (1996) in Hydrogen-Deficient Stars, Jeffery, C.S. and Heber, U. (Eds.), ASP Conf. Ser., 96, p.397.Google Scholar
Vauclair, G., Belmonte, J.A., Pfeiffer, B., Chevreton, M., Dolez, N., Motch, C., Werner, K. and Pakull, M. (1993) Astron. Astrophys., 267, L35.Google Scholar
Watson, T. (1992) IAU Circular 5603.Google Scholar
Werner, K., Dreizler, S., Heber, U. and Rauch, T. (1996) in Hydrogen-Deficient Stars, Jeffery, C.S. and Heber, U. (Eds.), ASP Conf. Ser., 96, p. 267.Google Scholar
Winget, D.E., Van Horn, H.M., Tassoul, M., Hansen, C.J., Fontaine, G. and Carroll, B.W. (1982a) Astrophys. J., 252, L65.Google Scholar
Winget, D.E., Robinson, E.L., Nather, R.E. and Fontaine, G. (1982b) Astrophys. J., 262, L11.CrossRefGoogle Scholar
Winget, D.E., Hansen, C.J. and Van Horn, H.M. (1983) Nature, 303, 781.Google Scholar
Winget, D.E., Hansen, C.J., Liebert, J., Van Horn, H.M., Fontaine, G., Nather, R.E., Kepler, S.O. and Lamb, D.Q. (1987) Astrophys. J., 315, L77.Google Scholar
Winget, D.E. et al. (1991) Astrophys. J., 378, 326.Google Scholar
Winget, D.E. et al. (1994) Astrophys. J., 430, 839.Google Scholar
Wood, M. (1992) Astrophys. J., 386, 539.Google Scholar