Triggering of stellar collapse by thermonuclear burning in a degenerate carbon core

Details Triggering of stellar collapse by thermonuclear burning in a degenerate carbon core Triggering of stellar collapse by thermonuclear burning in a degenerate carbon core

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977sva....21..571i&link_type=abstract

(Astronomicheskii Zhurnal, vol. 54, Sept.-Oct. 1977, p. 1009-1026.) Soviet Astronomy, vol. 21, Sept.-Oct. 1977, p. 571-581. Tra

Astronomy and Astrophysics

Astrophysics

5

Astrophysics, Carbon Stars, Gravitational Collapse, Stellar Evolution, Entropy, Hydrostatics, Neutron Stars, Stellar Mass, Stellar Models, Thermonuclear Reactions

Scientific paper

The evolution of stellar carbon cores with a mass of about 1.4 solar masses leads to a carbon flash for central mass densities ranging from 2 billion to 30 billion g/cu cm. This paper shows that for central mass densities of at least approximately 5 billion g/cu cm, thermonuclear combustion of the developing carbon flash causes a gravitational collapse which, in all probability, terminates in neutron-star formation. A hydrodynamic theory of carbon flash is outlined which is based on a deflagration mechanism of carbon burning and which quite fully accounts for all significant physical processes of relevance to highly degenerate matter except neutrino opacity. Results of flash calculations for two stellar models in hydrostatic equilibrium are presented and compared with results of collapse computations for stellar iron cores with masses of 1.2 to 2 solar masses.

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