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Collapse of Accreting White Dwarf to Form a Neutron Star

Published online by Cambridge University Press:  12 April 2016

Ken’ichi Nomoto ,
Shigeki Miyaji ,
Daiichiro Sugimoto  and
Koichi Yokoi
Ken’ichi Nomoto
Affiliation:
Department of Physics, Ibaraki University, Mito 310, Japan
Shigeki Miyaji
Affiliation:
Deparment of Earth Science and Astronomy, College of General Education, University of Tokyo, Tokyo 153, Japan
Daiichiro Sugimoto
Affiliation:
Deparment of Earth Science and Astronomy, College of General Education, University of Tokyo, Tokyo 153, Japan
Koichi Yokoi
Affiliation:
Science and Engineering Research Laboratory, Waseda University, Tokyo 160, Japan

Abstract

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In a close binary system with a primary star in the mass range 8-12 M⊙, the primary star leaves a white dwarf composed of 16O, 20Ne, and 24Mg as a result of mass exchange. When the companion star, fills its Roche lobe, overflowing matter accretes onto the white dwarf. We have computed the evolution of such an accreting O-Ne-Mg white dwarf and found that electron captures on 24Mg and 20Ne trigger the collapse when the mass reaches 1.38 M⊙. As a result of the collapse, oxygen begins to deflagrate but the effects of electron captures dominate over the oxygen deflagration. The white dwarf collapses to form a neutron star.

Type
Colloquium Session I
Information
International Astronomical Union Colloquium , Volume 53: White Dwarfs and Variable Degenerate Stars , August 1979 , pp. 56 - 60
Copyright
Copyright © The University of Rochester 1979

References

Arnett, W.D. 1977, Ap. J., 218, 815.CrossRefGoogle Scholar
Barkat, Z., Reiss, Y., and Rakavy, G. 1974, Ap. J. (Letters), 193, L21.CrossRefGoogle Scholar
Egawa, Y., Yokoi, K., and Yamada, M. 1975, Prog. Theor. Phys., 54, 1339.CrossRefGoogle Scholar
Mazurek, T.J. 1973, Ph. D. Thesis, Yeshiva Univ.Google Scholar
Paczyński, B. 1971, Acta Astron., 21, 1.Google Scholar
Nomoto, K., and Sugimono, D. 1977, Publ. Astron. Soc. Japan, 29, 765 Google Scholar
Nomoto, K., Sugimoto, D., and Neo, S. 1976, Astrophys. Space Sci., 39, L37.CrossRefGoogle Scholar
Yokoi, K., Neo, S., and Nomoto, K. 1979, Astron. Astrophys., in press.Google Scholar