Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..51..283n&link_type=abstract
Astrophysics and Space Science, vol. 51, no. 2, Oct. 1977, p. 283-301.
Astronomy and Astrophysics
Astrophysics
27
Gravitational Collapse, Iron, Oxygen, Stellar Evolution, Stellar Structure, Energy Dissipation, Kinetic Energy, Lagrange Coordinates, Muons, Neutrinos, Nucleons, Stellar Envelopes, Stellar Mass Ejection, Temperature Distribution, Thermal Dissociation
Scientific paper
The collapse of iron-oxygen stars with masses of 2 solar masses has been calculated. The commencement of the collapse is due to dissociation of iron-group nuclei into free nucleons. After a while, the collapse proceeds as a consequence of intensive energy losses due to neutrino volume radiation. At an intermediate stage of the collapse, a core that is opaque to neutrino radiation (neutrino core) is formed inside the collapsing star. Both the gradual increase of the mass of the neutrino core and the partial absorption of neutrinos radiated from the surface of the neutrino core by the stellar envelope (deposition) were taken into account in the calculations. Allowance was also made for the kinetics of oxygen burning in the outer layers of the envelope. Neither the deposition nor the oxygen burning results in ejection of stellar envelopes.
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