Collapse of low-mass stars

Details Collapse of low-mass stars Collapse of low-mass stars

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980afz....16..321b&link_type=abstract

(Astrofizika, vol. 16, Apr.-June 1980, p. 321-335.) Astrophysics, vol. 16, no. 2, Oct. 1980, p. 192-201. Translation.

Astronomy and Astrophysics

Astrophysics

2

Gravitational Collapse, Main Sequence Stars, Stellar Evolution, Stellar Mass Ejection, Electron Capture, Kinetic Equations, Neutrinos, Particle Energy, Stellar Models, Stellar Structure

Scientific paper

Calculations are made of the loss of stability and the initial phase in the collapse of the iron cores of stars with masses of 1.19 and 1.21 resulting from nonequilibrium beta processes. Detailed allowance is made for the kinetics of the beta processes and electron capture to excited states of the daughter nuclei. It is shown that in the collapse of stars with low mass near the Chandrasekhar limit, electron capture to excited states plays an important part in the neutronization of matter, which begins at central densities greater than or approximately equal to .1 Tg/cu cm. Graphs illustrate density effects on the rate of electron capture, temperature, rate of contraction, specific entropy, and the ratio of the total number of nucleons to the total number of protons.

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