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Seismological investigations of compact stars

Published online by Cambridge University Press:  03 August 2017

D. E. Winget†
D. E. Winget†*
Affiliation:
Department of Astronomy and McDonald Observatory, University of Texas, Austin, Texas 78712 U. S. A.

Abstract

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Since Landolt's discovery of the first ZZ Ceti star, the ranks of the compact pulsators have swollen to include planetary nebula nuclei, hot pre-white dwarf stars, hot and cool white dwarf stars, and possibly even neutron stars. The discovery of multi-periodic variations in these objects has helped to usher in a new era of rapid progress in the field of stellar seismology. For the compact stars this rapid progress is the result of a combination of four fortunate circumstances: their physical structure is relatively simple; typical amplitudes are small enough to be both readily observable and amenable to linear analysis; the wealth of observed periods in each object provides many independent clues to the underlying structure of the compact stars; and the periods are short enough that we can observe many cycles in a night, thereby completely resolving the period structure in many of these stars.

In this review I will discuss the current state of our understanding of these objects, with special emphasis on their distribution in the H-R diagram, range of pulsation properties, possible mode selection mechanisms, excitation of the pulsations, problems of convection, and particularly the measurement and interpretation of period changes. In addition to the results of recent research, I will review the techniques used to obtain them, pointing out both their strengths and weaknesses. I will close with a discussion of some of the important problems facing us in the study of these objects, and attempt to identify potentially fruitful directions for future research.

Type
Chapter 5: Seismological Investigations of Compact Stars
Information
Symposium - International Astronomical Union , Volume 123: Advances In Hello- and Asteroseismology , 1988 , pp. 305 - 324
Copyright
Copyright © Reidel 1988 

References

Barstow, M.A., Holberg, J.B., Grauer, A.D., and Winget, D.E., 1986, Ap. J. Letters, 306, L25.Google Scholar
Bond, H.E., Grauer, A. D., Green, R. F., and Liebert, J., 1984, Ap. J., 279, 751.CrossRefGoogle Scholar
Cox, A.N., 1986, Highlights of Astron., ed. Swings, J.P. Google Scholar
Chanmugan, G., 1972, Nat. Phys. Sci., 236, 83.Google Scholar
Dolez, N., and Vauclair, G. 1981, Astron. Ap., 102, 375.Google Scholar
Dziembowski, W., 1979, IAU Coll. #53, ed. Van Horn, H.M. and Weidemann, V. (Rochester, N.Y.: Univ. of Rochester), p. 359.Google Scholar
Dziembowski, W. and Koester, D., 1981, Astron. Ap., 97, 16.Google Scholar
Fontaine, G., Bergeron, P., Lacombe, P., Lomontange, R., and Talon, A. 1985, Astron. J., 90, 1094.Google Scholar
Fontaine, G., McGraw, J. T., Dearborn, D. S. P., Gustafson, J., and Lacombe, P. 1982, Ap. J., 258, 651.CrossRefGoogle Scholar
Fowler, W.A. and Meisl, C.C., 1985, Cosmogonical Processes, ed. Arnett, W.D., (Utrecht: VNU Science Press), in press.Google Scholar
Grauer, A. D., private communication.Google Scholar
Grauer, A.D., and Bond, H.E., 1984, Ap. J., 277, 211.Google Scholar
Green, R. F., 1980, Ap. J., 238, 685.Google Scholar
Green, R. F., Schmidt, M., and Liebert, J. 1986, Ap. J. Suppl., in press.Google Scholar
Greenstein, J. L. 1982, Ap. J., 258, 661.Google Scholar
Greenstein, J. L. 1986, Ap. J., 304, 334.Google Scholar
Hansen, C.J., 1980, in Proc. Conf. on Nonradial and Nonlin. Stel. Puls., ed. Hill, H.A. and Dziembowski, W. (Berlin: Springer), p. 445.Google Scholar
Hansen, C. J., Winget, D. E., Kawaler, S. D. 1985, Ap. J., 297, 544.Google Scholar
Hill, J. A. 1986, private communication.Google Scholar
Hill, J. A. 1986, Masters Thesis, University of Texas.Google Scholar
Iben, I. Jr., 1984, Ap. J., 277, 333.Google Scholar
Iben, I. Jr., Tutukov, A. V. 1984, Ap. J., 282, 615.Google Scholar
Kawaler, S. D., 1986a Ph.D. Thesis, Univ. Texas.Google Scholar
Kawaler, S. D., 1986b, these proceedings.Google Scholar
Kawaler, S. D., Hansen, C. J., and Winget, D. E., 1985a, Ap. J., 295, 547.Google Scholar
Kawaler, S. D., Winget, D. E., and Hansen, C. J., 1985b, Ap. J., 298, 752.Google Scholar
Kawaler, S. D., Winget, D. E., Iben, I. Jr., and Hansen, C.J., 1986a, Ap. J., 302, 530.Google Scholar
Kawaler, S. D., Winget, D. E., Hansen, C. J., and Iben, I. Jr., 1986b, Ap. J. Letters, 306, L41.Google Scholar
Kepler, S. O. 1984a, Ph. D. Thesis, University of Texas.Google Scholar
Kepler, S. O. 1984b, Ap. J., 278, 754.Google Scholar
Kepler, S. O. 1984c, Ap. J., 286, 314.Google Scholar
Kepler, S. O., Robinson, E. L., and Nather, R. E. 1983, Ap. J., 271, 744.Google Scholar
Kepler, S. O., Winget, D. E., Robinson, E. L., and Nather, R. E., 1986, these proceedings.Google Scholar
Koester, D., Vauclair, G., Dolez, N., Oke, J. B., Greenstein, J. L., and Weidemann, V. 1985, Astron. Ap., 149, 423.Google Scholar
Landolt, A. U. 1968, Ap. J., 153, 151.Google Scholar
Liebert, J., 1980, Ann. Rev. Astron. Astrophys., 18, 363.Google Scholar
Liebert, J., Dahn, C.C., and Sion, E.M., 1983, IAU Coll, 76, ed. Phillip, A.G.D. (L. Davis Press: Schenectady), p. 103.Google Scholar
Liebert, J., Wesemael, F., Hansen, C.J., Fontaine, G., Shipman, H.L., Sion, E.M., Winget, D.E., and Green, R.F., 1986, Ap. J., in press.Google Scholar
McGraw, J., 1979, Ap. J., 229, 203.Google Scholar
McGraw, J. T., Starrfield, S. G., Liebert, J., and Green, R. F., 1979, in IAU Colloq. #53, ed. Van Horn, H.M. and Weidemann, V. (Rochester, N.Y.: Univ. of Rochester), p. 377.Google Scholar
McGraw, J. T. and Robinson, E.L., 1976, Ap. J. Letters, 205, L155.Google Scholar
Nather, R. E., 1973, Vistas of Astronomy, 15, 91.Google Scholar
Nousek, J. A., Shipman, H. L., Holberg, J. B., Liebert, J., Pravdo, S. H., White, N. E., and Giommi, P., 1986, preprint.Google Scholar
O'Donoghue, D., 1986, in Adv. in Helio-Asteroseismology, ed. Gough, D. (Cambridge: Cambridge U. Press).Google Scholar
Osaki, Y. and Hansen, C.J., 1973, Ap. J., 185, 277.Google Scholar
Robinson, E.L., 1979, IAU Colloq. #53, p. 343 Google Scholar
Robinson, E.L., Kepler, S.O., and Nather, R.E., 1982, Ap. J., 259, 219.Google Scholar
Robinson, E. L., Stover, R. J., Nather, R. E., and McGraw, J. T. 1978, Ap. J., 220, 614.Google Scholar
Sauvenier-Goffin, E., 1949, Ann. d'Ap., 24, 237.Google Scholar
Schatzman, E., 1958, White Dwarfs (Amsterdam: North-Holland Publ. Co.).Google Scholar
Sion, E.M., 1984, Ap. J., 282, 612.Google Scholar
Sion, E.M., Liebert, J., and Starrfield, S.G., 1985, Ap. J., 292, 471.Google Scholar
Starrfield, S. G., Cox, A. N., Hodson, S., and Pesnell, W. D. 1982, in Pulsations in Classical and Cataclysmic Variable Stars, ed. Cox, J. P. and Hansen, C. J. (Boulder Joint Institute for Laboratory Astrophysics), 46.Google Scholar
Starrfield, S., Cox, A.N., Hodson, S.W., and Clancy, S.P., 1983, Ap. J., 269, 645.Google Scholar
Starrfield, S., Cox, A.N., Kidman, R.B., and Pesnell, W.D., 1984, Ap. J., 281, 800.Google Scholar
Starrfield, S, Cox, A. N., Kidman, R. B., and Pesnell, W.D. 1985, Ap. J., 293, 223.Google Scholar
Van Horn, H. M., 1984, in Theoretical Problems in Stellar Stability and Oscillations, ed. Noels, A. and Gabriel, M., (Coint-Ougree, Belgium: Universite de Liege), 307.Google Scholar
Van Horn, H.M., Hansen, C.J., Winget, D.E., Liebert, J., Fontaine, G., Nather, R.E., and Kepler, S.O., 1987, preprint.Google Scholar
Vauclair, G., 1971a, in White Dwarfs, IAU Symp. 42, ed. Luyton, W. J. Google Scholar
Vauclair, G., 1971b, Astrophys. Letters, 9, 161.Google Scholar
Warner, B. and Nather, R.E., 1970, MNRAS, 147, 21.Google Scholar
Warner, B. and Nather, R.E., 1972, MNRAS, 156, 1.Google Scholar
Warner, B. and Robinson, E.L., 1972, Nat. Phys. Sci., 239, 2.Google Scholar
Weidemann, V., and Koester, D. 1984, Astron. Ap., 132, 195.Google Scholar
Wesemael, F., Green, R.F., and Liebert, J., 1984, Ap. J. Suppl., 58, 379.Google Scholar
Winget, D. E. 1981, Ph.D. Thesis, University of Rochester.Google Scholar
Winget, D. E., 1986, in Highlights of Astron., ed. Swings, J.P., 221.Google Scholar
Winget, D. E. and Fontaine, G. 1982, in Pulsations in Classical and Cataclysmic Variable Stars, ed. Cox, J. P. and Hansen, C. J. (Boulder Joint Institute for Laboratory Astrophysics), 46.Google Scholar
Winget, D. E., Kepler, S. O., Robinson, E. L., Nather, R. E., and O'Donoghue, D. 1985, Ap. J., 292, 606.Google Scholar
Winget, D. E., Robinson, E. L., Nather, R. E., and Fontaine, G. 1982b, Ap. J., 262, L11.Google Scholar
Winget, D. E., Hansen, C. J., and Van Horn, H. M. 1983, Nature, 303, 781.Google Scholar
Winget, D. E., Van Horn, H. M., and Hansen, C. J. 1981, Ap. J., 245, L33.Google Scholar
Winget, D. E., Van Horn, H. M., Tassoul, M., Hansen, C. J., and Fontaine, G. 1983, Ap. J., 268, L33.Google Scholar
Winget, D. E., Van Horn, H. M., Tassoul, M., Hansen, C. J., Fontaine, G., and Carrol, B. W., 1982a, Ap. J., 252, L65.Google Scholar
Wood, M.A., Winget, D.E., Nather, R.E., Hessman, F.V., Liebert, J., Kurtz, D.W., Wesemael, F., Wegner, G., 1987, Ap. J., in press.Google Scholar