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Titolo:
Two-dimensional versus three-dimensional supernova hydrodynamic instability growth
Autore:
Kane, J; Arnett, D; Remington, BA; Glendinning, SG; Bazan, G; Muller, E; Fryxell, BA; Teyssier, R;
Indirizzi:
Univ Arizona, Tucson, AZ 85721 USA Univ Arizona Tucson AZ USA 85721Univ Arizona, Tucson, AZ 85721 USA Univ Arizona, Steward Observ, Tucson, AZ 85721 USA Univ Arizona Tucson AZUSA 85721 na, Steward Observ, Tucson, AZ 85721 USA Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94550 USA Univ CalifLawrence Livermore Natl Lab Livermore CA USA 94550 A 94550 USA Max Planck Inst Astrophys, D-85740 Garching, Germany Max Planck Inst Astrophys Garching Germany D-85740 740 Garching, Germany Univ Chicago, ASCI Flash Ctr, Chicago, IL 60637 USA Univ Chicago Chicago IL USA 60637 , ASCI Flash Ctr, Chicago, IL 60637 USA Ctr Etud Saclay, Serv Astrophys, DAPNIA, DSM,CEA, F-91191 Gif Sur Yvette, France Ctr Etud Saclay Gif Sur Yvette France F-91191 191 Gif Sur Yvette, France
Titolo Testata:
ASTROPHYSICAL JOURNAL
fascicolo: 2, volume: 528, anno: 2000,
parte:, 1
pagine: 989 - 994
SICI:
0004-637X(20000110)528:2<989:TVTSHI>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
RAYLEIGH-TAYLOR INSTABILITY; LINE-PROFILES; SN-1987A; 1987A; EVOLUTION; FRONTS; NICKEL;
Keywords:
hydrodynamics; instabilities; methods : numerical; supernovae : general;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Kane, J Univ Arizona, L-411 LLNL, Tucson, AZ 85721 USA Univ Arizona L-411 LLNL Tucson AZ USA 85721 , Tucson, AZ 85721 USA
Citazione:
J. Kane et al., "Two-dimensional versus three-dimensional supernova hydrodynamic instability growth", ASTROPHYS J, 528(2), 2000, pp. 989-994

Abstract

Numerical simulations using the SN hydrodynamics code PROMETHEUS are carried out to study the difference between growth of two-dimensional versus three-dimensional single-mode perturbations at the He-H and O-He interfaces ofSN 1987A. We find that in the rest frame of an unperturbed one-dimensionalinterface, a three-dimensional single-mode perturbation grows approximate to 30%-35% faster than a two-dimensional single-mode perturbation, when thewavelengths are chosen to give the same linear stage growth in the planar limit. In simulations where we impose single-mode density perturbations in the O layer of the initial model and random velocity perturbations in the postshock fluid near the He-H interface, we find that both axisymmetric O spikes and three-dimensional O spikes penetrate significantly further than two-dimensional O spikes. The difference between two dimensions and three dimensions predicted by our calculations is not enough to account for the difference between observed Co-56 velocities in SN 1987A and the results of previous two-dimensional simulations of SN 1987A, but our results suggest thatthe real three-dimensional hydrodynamics are noticeably different than thetwo-dimensional simulations predict.

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Documento generato il 26/11/20 alle ore 08:37:22