How stars explode

Details How stars explode How stars explode

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985amsci..73..240w&link_type=abstract

American Scientist (ISSN 0003-0996), vol. 73, May-June 1985, p. 240-247.

Computer Science

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Gravitational Collapse, Stellar Cores, Stellar Evolution, Supernovae, Thermonuclear Explosions, Abundance, Elliptical Galaxies, Implosions, Neutron Stars, Spiral Galaxies, Stellar Mass, Stellar Models, White Dwarf Stars

Scientific paper

Two major classes of supernovae occur in the three major classes of galaxies. Elliptical galaxies, containing only old stars, feature type I supernovae, i.e., elements between, but not including, hydrogen and iron. Type I events also occur in the spiral arms of spiral galaxies and, inexplicably, in regions of recent star formation. Type II supernovae are dominated by hydrogen species and may involve the implosion of a stellar core, yielding neutron stars. Stars with masses of 10-20 solar masses may undergo the type II process. The explosion process appears purely hydrodynamical, with the core collapsing to nuclear matter, rebounding and driving a shock wave into the core. The process may not be valid for all type II events. Carbon-oxygen white dwarfs may be the progenitors of type I events, which involve nucleosynthetic processes comparable to those calculated for novae of supermassive stars. Known deficiencies in models for both types of events are discussed.

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