Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T03:35:07.578Z Has data issue: false hasContentIssue false
  • English
  • Français

On Evolutionary Models for SNI Progenitor Stars

Published online by Cambridge University Press:  12 April 2016

Jeffrey D. Colvin
Jeffrey D. Colvin*
Affiliation:
EG&G/Los Alamos Operations

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

It has been proposed that the Type I supernova (SNI) explosion starts in a white dwarf (WD) star that is accreting mass from a companion star in a close binary orbit. Others’ computations have described this explosion, but how an accreting WD can ever become an SNI if it first ejects the accreted envelope in one or more nova outbursts is still unresolved. My calculations of WD evolution include the effects of mass accretion, convective mixing, nuclear burning, and gravitational settling. These calculations test the Starrfield, Truran, and Sparks (1981) proposal that at low accretion rates, settling of the CNO nuclei will lead to steady-state hydrogen burning, not nova outburst. The preliminary results of this study, consisting of two evolutionary sequences of an initially cool pure 12C 1.0 Mʘ WD show that nearly half of the carbon near the base of the accreted layer, initially of solar composition, gravitationally diffuses out in 2 x 105 years.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 72: Cataclysmic Variables and Related Objects , 1983 , pp. 143 - 148
Copyright
Copyright © Reidel 1983

References

REFERENCES

Beaudet, G., Petrosian, V., and Salpeter, E.E. 1967, Ap. J., 150, 979.CrossRefGoogle Scholar
Colvin, J.D., Van Horn, H.M., Starrfield, S.G., and Truran, J.W. 1977, Ap. J., 212, 791.CrossRefGoogle Scholar
Fontaine, G., and Michaud, G. 1979, Ap. J., 231, 826.CrossRefGoogle Scholar
Fontaine, G., Graboske, H.C. Jr., and Van Horn, H.M. 1977, Ap. J. Suppl., 35, 293.CrossRefGoogle Scholar
Kippenhahn, R., Weigert, A., and Hofmeister, E. 1967, Meth. Comput. Phys., 7, 129.Google Scholar
Lamb, D.Q. 1974, Ph.D. Thesis, Univ. of Rochester, N.Y. Google Scholar
Muchmore, D. 1981, preprint.Google Scholar
Nomoto, K. 1980, Proceedings of the Texas Workshop on Type I Supernovae (Austin: University of Texas Press).Google Scholar
Starrfield, S.G., Truran, J.W., and Sparks, W.M. 1981, Ap. J., 243, L27.CrossRefGoogle Scholar
Starrfield, S.G., Truran, J.W., Sparks, W.M., and Kutter, G.S. 1972, Ap. J, 176, 169.CrossRefGoogle Scholar