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Prog. Theor. Phys. Vol. 48 No. 6 (1972) pp. 1870-1884

[ Full Text PDF : FREE ACCESS (1339K) ]

Stellar Evolution toward Pre-Supernova Stage. II

— Carbon and Oxygen Stars of 1.5M⊙ and 2.6M⊙ —

Satoru Ikeuchi, Kiyoshi Nakazawa, Tadayuki Murai,* Reiun Hōshi** and Chushiro Hayashi

Department of Physics, Kyoto University, Kyoto
*Department of Physics, Nagoya University, Nagoya
**Department of Physics, Rikkyo University, Tokyo

(Received May 19, 1972)

Abstract:

As a continuation of the preceding paper, the evolution of carbon-oxygen stars of 1.5M⊙ and 2.6M⊙ has been computed from a pre-carbon-burning stage to a pre-supernova stage for the two alternative cases, with and without neutrino loss.
In the case without neutrinos, it has been found that after the termination of central carbon-burning electrons become degenerate at the center and both neon-burning and siliconburning begin as strong flashes. Finally, both of the stars become dynamically unstable on account of the photo-disintegration of iron.
In the case with neutrinos, the inversion of temperature gradient occurs in stages after central carbon-burning. This is due to the effect of neutrino loss coupled with the effect of electron degeneracy. Finally, the 1.5M⊙ star and the 2.6M⊙ star become unstable on account of the inverse-beta process of silicon and the photo-disintegration of iron, respectively.


URL : http://ptp.ipap.jp/link?PTP/48/1870/
DOI : 10.1143/PTP.48.1870

[ Full Text PDF : FREE ACCESS (1339K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 54 No. 5 (1975) pp. 1325-1338 :
    Supernova Explosion and Neutral Currents of Weak Interaction
    Katsuhiko Sato

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