Formation of initial perturbation of Rayleigh-Taylor instability in supernovae and laser-irradiated targets - Is there any similarity?

Citation
H. Azechi et al., Formation of initial perturbation of Rayleigh-Taylor instability in supernovae and laser-irradiated targets - Is there any similarity?, ASTROPH J S, 127(2), 2000, pp. 219-225
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
ISSN journal
0067-0049 → ACNP
Volume
127
Issue
2
Year of publication
2000
Pages
219 - 225
Database
ISI
SICI code
0067-0049(200004)127:2<219:FOIPOR>2.0.ZU;2-J
Abstract
It is suggested that the formation of initial hydrodynamic perturbation in the early phase of supernova explosions is analogous to the initial "imprin t" process of laser nonuniformity on a target for inertial confinement fusi on. If the radiation pressure in supernovae is spatially nonuniform due pos sible to nonuniform neutrino heating, the interface between the early bubbl e and the envelope will be deformed, resulting in a seed of the Rayleigh-Ta ylor instability and convection. When laser light is first applied on a tar get, nonuniformity in laser irradiation is "imprinted" on the surface, whic h then set the initial perturbation of the subsequent Rayleigh-Taylor insta bility. We will review a reasonably simple imprint model, test it in the la ser experiments, and apply it on the supernova process. If this analogy is correct, the velocity perturbation may be significantly increased compared with a secular distortion due to the pressure nonuniformity.