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On the Time-Scale for Turn-Off of a Nova After the Outburst*

  • Sumner Starrfield (a1)
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It is now generally accepted that a nova outburst is caused by a thermonuclear runaway (TR) in the accreted hydrogen rich envelope of a carbon white dwarf. Over the past few years we have studied the evolution of such runaways and have shown that the calculated evolutionary sequences are in substantial agreement with the observations (Starrfield, et. al. 1978; Sparks, et. al. 1978). In the published work we have varied the white dwarf mass, the envelope mass, the accreted envelope mass, and the chemical composition in the envelope (Starrfield, et. al. 1976; Gallagher and Starrfield 1978). In all cases we find that a TR results in mass ejection and the luminosity variations of this ejected material can reproduce the observed light curves of the fast and slow novae.

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*

Supported in part by the National Science Foundation under Grant AST77-23190 to Arizona State University.

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References
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Castor, J. I., Abbot, D. C., and Klein, R. I. 1975, Ap. J., 195, 157.
Gallagher, J. S., and Code, A. D. 1974, Ap. J., 189, 303.
Gallagher, J. S., and Starrfleld, S. 1976, M.N.R.A.S., 176, 53.
Gallagher, J. S., and Starrfleld, S. 1978, Annual Reviews Astr. and Astrophysics, 16, 171.
Hagen, W. 1978, Ap. J. Suppl., 38, 1.
Lucy, L. B., and Solomon, P. M. 1967, Ap. J., 159, 879.
McLaughlin, D. M. 1960, in Stars and Stellar Systems VI. Stellar Atmospheres, ed. Greenstein, J. L. (Chicago: Univ. of Chicago Press), p.585.
Nariai, K. 1974, P.A.S. Japan, 26, 57.
Ney, E. P., and Hatfield, B. F. 1978, Ap. J. Lett., 219, L111.
Paczynski, B. 1976, in Structure and Evolution of Close Binary Systems, ed. Eggleton, P., Mitton, S., Whelan, J. (Dordrecht: Reidel) p.75.
Reimers, D. 1975, in Problems of Stellar Hydrodynamics, ed. Ledoux, P., Mem. Roy. Soc. Sci. Liege, 8, 369.
Sparks, W. M., Starrfleld, S., and Truran, J. W. 1978, Ap. J., 220, 1063.
Starrfleld, S., Sparks, W. M., and Truran, J. W. 1974, Ap. J. Suppl., 28, 247.
Starrfleld, S., Sparks, W. M., and Truran, J. W. 1976, in Structure and Evolution of Close Binary Stars, ed. Eggleton, P., et. al. (Dordrecht: Reidel) p.155.
Starrfleld, S., Truran, J. W., and Sparks, W. M. 1978, Ap. J., 226, 186.
Taam, R. E., Bodenheimer, P., and Ostriker, J. P. 1978, Ap. J., 222, 269.
Thackeray, A. D. 1977, Mem. R.A.S., 83, 1.
Truran, J. W. 1979, in Proceedings of IAU Colloquium No. 53, White Dwarfs and Variable Degenerate Stars, ed. Van Horn, H. M. and Weidemann, V..
Wu, C. C., and Kester, D. 1977, Astr. and Astro., 58, 331.
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Proceedings of the International Astronomical Union
  • ISSN: -
  • EISSN: 0252-9211
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
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