Propagation of shock waves in type-II presupernovae

Details Propagation of shock waves in type-II presupernovae Propagation of shock waves in type-II presupernovae

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999astl...25..649d&link_type=abstract

Astronomy Letters, Volume 25, Issue 10, October 1999, pp.649-655

Astronomy and Astrophysics

Astronomy

3

Scientific paper

We explore the reliability of the approximate methods which are used to estimate the velocity and temperature at the front of a shock wave that passes in a type-II presupernova successively through the carbon-oxygen shell, the helium shell, and the base of the hydrogen-helium envelope. This issue deserves a special consideration, because the attendant nucleosynthesis depends on the shock-front temperature and on other hydrodynamic parameters. The temperature of the shock-heated matter in the carbon-oxygen and silicon shells is shown to be so high that the contribution of electron-positron pairs to the equation of state becomes appreciable.

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