Prog. Theor. Phys. Vol. 22 No. 4 (1959) pp. 531-543

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Evolution of Massive Stars. II

— Helium-Burning Stage —

Chushiro Hayashi, Jun Jugaku and Minoru Nishida

Department of Nuclear Science
and
Research Institute for Fundamental Physics, Kyoto University, Kyoto

(Received July 20, 1959)

Abstract:

To investigate the evolution of massive stars in the helium-burning stage, four sample models (M = 15.6M_⊙) consisting of the following four regions are constructed: (1) hydrogen-rich envelope, (2) radiative zone with varying hydrogen content, (3) radiative helium region, (4) convective helium core. The results show that these models lie in the Hertzsprung gap of the h and χ Persei cluster and do not explain the existence of the red supergiants branch of this cluster. These models are also compared with those in which the rate of helium burning is slower by a factor of 10. The comparison shows that the properties of models having the double energy-source are very sensitive to the rates of both the hydrogen- and helium-burning.

URL : http://ptp.ipap.jp/link?PTP/22/531/
DOI : 10.1143/PTP.22.531

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Citing Article(s) :

Progress of Theoretical Physics Vol. 23 No. 5 (1960) pp. 896-902 :
On Stellar Models with Double Energy-Sources

Minoru Nishida
Progress of Theoretical Physics Vol. 25 No. 6 (1961) pp. 1053-1056 :
Evolution of a Star with Intermediate Mass after Hydrogen Burning

Chushiro Hayashi, Minoru Nishida and Daiichiro Sugimoto
Progress of Theoretical Physics Vol. 27 No. 1 (1962) pp. 145-154 :
Evolution of Population II Stars in the Helium-Burning Phase

Minoru Nishida and Daiichiro Sugimoto
Progress of Theoretical Physics Vol. 27 No. 6 (1962) pp. 1233-1252 :
Evolution of a Star with Intermediate Mass after Hydrogen Burning. I

Chushiro Hayashi, Minoru Nishida and Daiichiro Sugimoto
Progress of Theoretical Physics Vol. 29 No. 1 (1963) pp. 29-43 :
Thermonuclear Reactions in Stars Involving Heavy Ions up to the Formation of Iron Nuclei

Hiroshi Tsuda