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Título: Supernovae: Where and why do they break off?
Autores: Herrera, L.
Núñez, Luis
Correo Electrónico: laherrera@telcel.net.ve
nunez@ula.ve
Editor: SABER ULA
Resumen: Supernovae: Where and why do they break off? (Herrera, L.; Núñez, Luis) Abstract The precise mechanism whereby gravitational collapse leads to a type II supernova event is one of the most controversial points in the understanding of the final stages of stellar evolution. The 'bounceshock' mechanism and the proposed `long-term neutrino mediated' processes compete to explain the ejection of the outer envelopes of the star. Despite their differences, both descriptions consider the shock as mainly responsible for the ejection of the outer mantle in a supernova burst. In this note we discuss results from collapse calculations in which the shock is considered as an interface separating the quasi-static stiff core from the outer mantle. In the models considered the shock fades out and becomes a new boundary surface delimiting the compact homogeneous remnant. The resulting pictures become intelligible in the light of a recently proposed generalization of the concept of adiabatic index for systems where radiation flux is present. Artículo publicado en: Astrophysical and Space Science. 188: 9-18 1992.
Fecha: 8-Dec-2005
Palabras Claves: Distribuciones autogravitantes
Astrofísica
Palabras Clave: Astrophysics
Gravitational collapse
Neutrinos
Stellar envelopes
Stellar evolution
Supernovae
Relativity
Shock waves
Stellar luminosity
Supernova 1987a
URI: http://www.saber.ula.ve/handle/123456789/16850
Aparece en colecciones:Articulos, Pre-prints (Facultad de Ciencias)

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