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Prog. Theor. Phys. Vol. 44 No. 2 (1970) pp. 375-388

[ Full Text PDF : FREE ACCESS (931K) ]

Mixing between Stellar Envelope and Core in Advanced Phases of Evolution. I

— General Treatment and Brief Summary of Results —

Daiichiro Sugimoto

Department of Physics, Nagoya University, Chikusa, Nagoya

(Received May 9, 1970)

Abstract:

Stellar structure in very advanced phases of evolution is discussed, taking into account the hydrogen-rich envelope. The star is divided into the envelope and the core. It is shown that the envelope with an extended surface-convection zone can be replaced, to a good approximation, by suitable boundary conditions at the outer edge of the core. Computing evolution of the core with these boundary conditions, we can discuss mixing between the stellar core and envelope through a deepening surface convection zone; the condition for the mixing is formulated as an entropy condition at the edge of the core. Simplified model of the core is studied to understand how the mixing proceeds in the very advanced phases of evolution. Detailed numerical computation has been made for the stars of masses about 30 and 12 M⊙ through oxygen-burning phase, and for the star of mass about 6M⊙ through the phase of carbon-shell burning. In the present paper, however, we give physical data used in this series of studies, and only a brief summary of numerical results. The detailed results will be given in papers II and III of this series.


URL : http://ptp.ipap.jp/link?PTP/44/375/
DOI : 10.1143/PTP.44.375

[ Full Text PDF : FREE ACCESS (931K) ] Citation:

References:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 44 No. 3 (1970) pp. 599-616 :
    Mixing between Stellar Envelope and Core in Advanced Phases of Evolution. II
    Daiichiro Sugimoto
  2. Progress of Theoretical Physics Vol. 45 No. 3 (1971) pp. 761-775 :
    Mixing between Stellar Envelope and Core in Advanced Phases of Evolution. III
    Daiichiro Sugimoto
  3. Progress of Theoretical Physics Vol. 46 No. 6 (1971) pp. 1713-1737 :
    Stellar Evolution toward Pre-Supernova Stage. I
    Satoru Ikeuchi, Kiyoshi Nakazawa, Tadayuki Murai, Reiun Hōshi and Chushiro Hayashi
  4. Progress of Theoretical Physics Vol. 48 No. 1 (1972) pp. 46-65 :
    Mixing between Stellar Envelope and Core in Advanced Phases of Evolution. IV
    Ken-ichi Nomoto and Daiichiro Sugimoto
  5. Progress of Theoretical Physics Vol. 48 No. 6 (1972) pp. 1885-1898 :
    Time Variation of Metal Abundance in Galaxies
    Satoru Ikeuchi, Humitaka Sato, Tohru Sato and Hidenori Takeda
  6. Progress of Theoretical Physics Vol. 52 No. 2 (1974) pp. 453-470 :
    Penetration of Convective Envelope into Stellar Core and Existence of Neutrino Loss
    Ken'ichi Nomoto
  7. Progress of Theoretical Physics Supplement No.70 (1981) pp. 115-131 :
    Stable Numerical Method in Computation of Stellar Evolution
    Daiichiro Sugimoto, Ken'ichi Nomoto and Yoshiharu Eriguchi

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