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Titolo:
ON THE INSTABILITY OF DEFLAGRATION FRONTS IN WHITE-DWARFS
Autore:
LIVNE E; ARNETT D;
Indirizzi:
UNIV ARIZONA,STEWARD OBSERV TUCSON AZ 85721
Titolo Testata:
The Astrophysical journal
fascicolo: 2, volume: 415, anno: 1993,
parte:, 2
pagine: 120000107 - 120000109
SICI:
0004-637X(1993)415:2<120000107:OTIODF>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
RAYLEIGH-TAYLOR INSTABILITY; I SUPERNOVAE; MODELS;
Keywords:
SUPERNOVAE, GENERAL; WHITE DWARFS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
E. Livne e D. Arnett, "ON THE INSTABILITY OF DEFLAGRATION FRONTS IN WHITE-DWARFS", The Astrophysical journal, 415(2), 1993, pp. 120000107-120000109

Abstract

We discuss the stability of a deflagration front in white dwarfs in the context of burning mechanisms for Type Ia Supernovae. It is shown that the basic characteristics of the instability of the deflagration front are different from those of Rayleigh-Taylor instability, on whichthe deflagration models rely. In view of this, together with results from two-dimensional simulations, we argue that the deflagration modelneeds reconsideration, as Rayleigh-Taylor instability cannot explain the required high flame speed required for producing an explosion similar to Type Ia Supernovae. On the other hand, the same arguments implythat delayed detonation is acceptable and that the transition to detonation must occur in the very low density regime, where good agreementbetween observations and numerical results is obtained.

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Documento generato il 27/11/20 alle ore 15:51:05