Prog. Theor. Phys. Vol. 27 No. 1 (1962) pp. 127-132
On the Origin of Planetary Nebulae
Department of Physics, Hokkaido University, Sapporo
(Received July 24, 1961)
A hypothesis that planetary nebulae originate from red giants when the helium burning begins in the degenerate helium core is proposed and examined quantitatively. It is assumed that the shock wave is generated by the rapid core expansion which is caused by the removal of degeneracy at the helium core. The propagation of the shock wave is analysed by the quasi-stationary method. The obtained expansion velocity and thrown mass are 95 km/sec and 0.5M⊙ respectively. A relation between remnant stars and nuclei of planetary nebulae is also discussed briefly.
DOI : 10.1143/PTP.27.127
- R. Härm and M. Schwarzschild, Astron. J. 66 (1961), 45.
- S. Hayakawa, C. Hayashi, M. Imoto and K. Kikuchi, Prog. Theor. Phys. 16 (1956), 507[PTP].
E. E. Salpeter, Phys. Rev. 107 (1957), 516[APS].
- R. Härm M. Schwarzschild, private communication.
- Y. Ôno and S. Sakashita, Publ. Astron. Soc. Jpn. 13 (1961), 146.
- Y. Ôno, S. Sakashita and H. Yamazaki, Prog. Theor. Phys. 23 (1960), 294[PTP].
Y. Ôno, Prog. Theor. Phys. 24 (1960), 825[PTP].
- See, e. g. R. Courant and K. O. Friedrichs, Supersonic Flow and Shock waves (Interscience Publ., New York, 1948).
- I. S. Shklovsky, Non-Stable Stars, I. A. U. Symposium No. 3 (1957), p. 83.
- M. Nishida, Prog. Theor. Phys. 23 (1960), 896[PTP].
G. B. Whitham, J. Fluid. Mech. 4 (1958), 337[CrossRef].
Citing Article(s) :
Progress of Theoretical Physics Vol. 30 No. 2 (1963) pp. 170-190
On the Explosion of Type II Supernova
Progress of Theoretical Physics Vol. 32 No. 2 (1964) pp. 207-219
Shock Propagation in Inhomogeneous Gases. V
Toshihisa Ishizuka, Yoshiaki Hashimoto and Yōrō Ōno
Progress of Theoretical Physics Vol. 32 No. 5 (1964) pp. 703-725
Helium Flash in Less Massive Stars