Titre du document

A possible model of supernovae: Detonation of12C

Lien vers le document
Nom du Corpus

AstroConcepts

Auteur(s)
  • W. David Arnett
Affiliation(s)
  • California Institute of Technology, Pasadana, Calif., USA
  • Institute of Theoretical Astronomy, Cambridge, England
Résumé

Stars of intermediate mass (4M ??M?9M ?) may ignite the12C+12C reaction explosively because of the high degree of electron degeneracy in their central regions. After the exhaustion of helium burning in the core of such stars, a helium-burning shell develops which is thermally unstable. Approximating this shell by suitable boundary conditions, the subsequent evolution of the core is examined quantitatively by standard techniques. An explosive instability due to ignition and detonation of12C+12C develops at a central density ?c ? 2 × 109. Subsequent hydrodynamic expansion is computed; final velocities of expansion up tov?20 000 km/sec are found. The star is totally disrupted; no condensed remnant is left. Such an explosion may be a plausible model for a significant fraction of supernovae. Investigation of the relevant nuclear reaction network shows that the entire core (M core?1.37M ?) is processed through12C burning,16O burning and silicon burning. Significant amounts of56Ni are produced. This nucleosynthesis is critically sensitive to the exact central density at which the12C+12C reaction ignites; several factors which affect this critical density are discussed. A brief summary of other supernovae thories which have been expounded in detail is presented for comparison.

Langue(s) du document
Anglais
Année de publication
1969
Revue

Astrophysics and Space Science

Éditeur
Springer (journals)
Type de publication
journal
Type de document
research-article
Présence de XML structuré
Non
Version de PDF
1.3
Score de qualité du texte
9.292
Nom du concept
  • Post Newtonian approximation
Catégories Science-Metrix
  • 1 - natural sciences ; 2 - physics & astronomy ; 3 - astronomy & astrophysics
Catégories Inist
  • 1 - sciences appliquees, technologies et medecines ; 2 - sciences exactes et technologie ; 3 - terre, ocean, espace ; 4 - astronomie
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Space and Planetary Science
  • 1 - Physical Sciences ; 2 - Physics and Astronomy ; 3 - Astronomy and Astrophysics
Catégories WoS
  • 1 - science ; 2 - astronomy & astrophysics
Identifiant ISTEX
7AD18605ED71D84FC973A3B28D85E73A342A19DA
ark:/67375/1BB-FDC9ZGRB-D
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