Impact of rotation on the evolution of convective vortices in collapsing stars
Abdikamalov E. Foglizzo T. Mukazhanov O.
1 May 2021Oxford University Press
Monthly Notices of the Royal Astronomical Society
2021#503Issue 33617 - 3628 pp.
We study the impact of rotation on the hydrodynamic evolution of convective vortices during stellar collapse. Using linear hydrodynamics equations, we study the evolution of the vortices from their initial radii in convective shells down to smaller radii where they are expected to encounter the supernova shock. We find that the evolution of vortices is mainly governed by two effects: the acceleration of infall and the accompanying speed up of rotation. The former effect leads to the radial stretching of vortices, which limits the vortex velocities. The latter effect leads to the angular deformation of vortices in the direction of rotation, amplifying their non-radial velocity. We show that the radial velocities of the vortices are not significantly affected by rotation. We study acoustic wave emission and find that it is not sensitive to rotation. Finally, we analyse the impact of the corotation point and find that it has a small impact on the overall acoustic wave emission.
Accretion , Accretion discs , Convection , Hydrodynamics , Stars: massive , Supernovae: general , Turbulence
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Department of Physics, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Energetic Cosmos Laboratory, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
UMR AIM, CEA-CNRS, Univ. Paris Diderot, CEA Saclay, Gif-sur-Yvette, F-91191, France
Department of Physics
Energetic Cosmos Laboratory
UMR AIM
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