Formation of Initial Perturbation of Rayleigh-Taylor Instability in Supernovae and Laser-Irradiated Targets-Is There Any Similarity?

Details Formation of Initial Perturbation of Rayleigh-Taylor Instability in Supernovae and Laser-Irradiated Targets-Is There Any Similarity? Formation of Initial Perturbation of Rayleigh-Taylor Instability in Supernovae and Laser-Irradiated Targets-Is There Any Similarity?

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apjs..127..219a&link_type=abstract

The Astrophysical Journal Supplement Series, Volume 127, Issue 2, pp. 219-225.

Astronomy and Astrophysics

Astronomy

3

Hydrodynamics, Instabilities, Radiative Transfer, Stars: Supernovae: General

Scientific paper

It is suggested that the formation of initial hydrodynamic perturbation in the early phase of supernova explosions is analogous to the initial ``imprint'' process of laser nonuniformity on a target for inertial confinement fusion. If the radiation pressure in supernovae is spatially nonuniform due possible to nonuniform neutrino heating, the interface between the early bubble and the envelope will be deformed, resulting in a seed of the Rayleigh-Taylor instability and convection. When laser light is first applied on a target, nonuniformity in laser irradiation is ``imprinted'' on the surface, which then set the initial perturbation of the subsequent Rayleigh-Taylor instability. We will review a reasonably simple imprint model, test it in the laser 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.

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