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