3D SASI

SASI in Three Dimensions

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Endeve, E., Cardall, C. Y., Budiardja, R. D. & Mezzacappa, A. 2010, in prep
Generation of Magnetic Fields by the Stationary Accretion Shock Instability

Iwakami, W., Ohnishi, N., Kotake, K., Yamada, S. & Sawada, K. 2009, Ap&SS, 322, 43
Spiral mode of standing accretion shock instability in core-collapse supernovae

Iwakami, W., Kotake, K., Ohnishi, N., Yamada, S. & Sawada, K. 2009, ApJ, 700, 232
Effects of Rotation on Standing Accretion Shock Instability in Nonlinear Phase for Core-Collapse Supernovae
Three-dimensional hydrodynamic simulations using a realistic equation of state and neutrino heating and cooling. Rotation is added to infalling gas once the nonlinear phase begins. Find that amplitudes of spiral modes increase significantly with rotation in the progressive direction.

Iwakami, W., Kotake, K., Ohnishi, N., Yamada, S. & Sawada, K. 2008, ApJ, 678, 1207
Three-Dimensional Simulations of Standing Accretion Shock Instability in Core-Collapse Supernovae

Blondin, J. M. & Shaw, S. 2007, ApJ, 656, 366
Linear Growth of Spiral SASI Modes in Core-Collapse Supernovae
Two-dimensional simulations in the equatorial plane are used to study non-axisymmetric modes of the SASI. These modes are excited by dropping a density perturbation onto the accretion shock. The perturbation is in the shape of a bar oriented at an angle with respect to the spherical shock. The result sends a wave rotating around the accreting star. The amplitude of the perturbation is tracked by computing the Fourier components of the angular velocity.

Blondin, J. M. & Mezzacappa, A. 2007, Nature, 445, 58
Pulsar Spins from an Instability in the Accretion Shock of Supernovae

Blondin, J. M. & Mezzacappa, A. 2006, ApJ, 642, 401
The Spherical Accretion Shock Instability in the Linear Regime
A careful study of the evolution of the SASI in the linear regime, quantifying growth rates as a function of the standoff distance of the accretion shock.

Blondin, J. M., Mezzacappa, A., & DeMarino, C. 2003, ApJ, 584, 971
Stability of Standing Accretion Shocks, With an Eye Toward Core Collapse Supernovae
Original discovery of the SASI. Attributed instability to Vortical Acoustic coupling described by Foglizzo, but is not (?) the case.


Last update February 3, 2010

Research by John M. Blondin Department of Physics, North Carolina State University