Pulsation regime of the thermonuclear explosion of a star's dense carbon core

Computer Science – Numerical Analysis

Scientific paper

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Astronomical Models, Carbon, Hydrodynamic Equations, Nuclear Explosions, Nuclear Fusion, Stellar Structure, Neutrinos, Neutron Stars, Numerical Analysis, Oscillations, Supernovae

Scientific paper

The hydrodynamical problem of nuclear explosion of a dense carbon core of a star with mass equal to 1.40 solar mass is solved numerically. In calculation the kinetics of carbon burning at the nuclear reaction C-12 + C-12 yields M-24 + gamma rate is included. Thus the inverse effect of hydrodynamical motion on the process of thermonuclear burning is taken into account, as compared with Bruenn's (1972) calculations. The calculations show that a pulsation regime of burning is realized which evolves to the detonation regime with full combustion and disruption of the star only at the third pulse. The effects of disintegration of iron group nuclei, neutronization of matter, and neutrino losses in URCA processes have not yet been considered in calculations. Conclusions are made on new possibilities of formation of a gravitationally bound remnant of the explosion and a neutron star.

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