Turbulence Generation by Shock-Acoustic-Wave Interaction in Core-Collapse Supernovae
Loading...
Date
2018-05-07
Authors
Abdikamalov, Ernazar
Huete, César
Nussupbekov, Ayan
Berdibek, Shapagat
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract
Convective instabilities in the advanced stages of nuclear shell burning can play
an important role in neutrino-driven supernova explosions. In our previous work, we studied
the interaction of vorticity and entropy waves with the supernova shock using a linear perturbations
theory. In this paper, we extend our work by studying the effect of acoustic waves. As the acoustic
waves cross the shock, the perturbed shock induces a field of entropy and vorticity waves in the
post-shock flow. We find that, even when the upstream flow is assumed to be dominated by sonic
perturbations, the shock-generated vorticity waves contain most of the turbulent kinetic energy in the
post-shock region, while the entropy waves produced behind the shock are responsible for most of
the density perturbations. The entropy perturbations are expected to become buoyant as a response
to the gravity force and then generate additional turbulence in the post-shock region. This leads to
a modest reduction of the critical neutrino luminosity necessary for producing an explosion, which
we estimate to be less than 5%.
Description
Keywords
hydrodynamics, shock waves, turbulence, supernovae: general
Citation
Abdikamalov, E.; Huete, C.; Nussupbekov, A.; Berdibek, S. Turbulence Generation by Shock-Acoustic-Wave Interaction in Core-Collapse Supernovae. Particles 2018, 1, 97-110.