Parametric Study of Flow Patterns behind the Standing Accretion Shock Wave for Core-Collapse Supernovae

Abstract

In this study, we conduct three-dimensional hydrodynamic simulations systematically to investigate the flow patterns behind the accretion shock waves that are commonly formed in the post-bounce phase of core-collapse supernovae. Adding small perturbations to spherically symmetric, steady, shocked accretion flows, we compute the subsequent evolutions to find what flow pattern emerges as a consequence of hydrodynamical instabilities such as convection and standing accretion shock instability (SASI) for different neutrino luminosities and mass accretion rates. Depending on these two controlling parameters, various flow patterns are indeed realized. We classify them into three basic patterns and two intermediate ones; the former includes sloshing motion (SL), spiral motion (SP) and multiple buoyant bubble formation (BB); the latter consists of spiral motion with buoyant-bubble formation (SPB) and spiral motion with pulsationally changing rotational velocities (SPP). Although the post-shock flow is highly chaotic, there is a clear trend in the pattern realization. The sloshing and spiral motions tend to be dominant for high accretion rates and low neutrino luminosities, and multiple buoyant bubbles prevail for low accretion rates and high neutrino luminosities. It is interesting that the dominant pattern is not always identical between the semi-nonlinear and nonlinear phases near the critical luminosity; the intermediate cases are realized in the latter case. Running several simulations with different random perturbations, we confirm that the realization of flow pattern is robust in most cases.

Accepted for publication in ApJ, 54 pages, 20 figures, 3 table

References in corpus (10)

• Instability of a stalled accretion shock: evidence for the advective-acoustic cycle
• Pulsar spins from an instability in the accretion shock of supernovae
• A non-spherical core in the explosion of supernova SN 2004dj
• Multidimensional supernova simulations with approximative neutrino transport. II. Convection and the advective-acoustic cycle in the supernova core
• Effect of Rotation on the Stability of a Stalled Cylindrical Shock and its Consequences for Core-Collapse Supernovae
• Effects of Rotation on Standing Accretion Shock Instability in Nonlinear Phase for Core-Collapse Supernovae
• Characterizing SASI- and Convection-Dominated Core-Collapse Supernova Explosions in Two Dimensions
• Stability of the Accretion Flows with Stalled Shocks in Core-Collapse Supernovae
• Standing Accretion Shocks in the Supernova Core: Effects of Convection and Realistic EOS
• Angular momentum redistribution by SASI spiral modes and consequences for neutron star spins

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• The explosion mechanism of core-collapse supernovae: progress in supernova theory and experiments
• Simulations of core-collapse supernovae in spatial axisymmetry with full Boltzmann neutrino transport
• Core-collapse supernova neutrino emission and detection informed by state-of-the-art three-dimensional numerical models
• Three-Dimensional Simulations of SASI- and Convection-Dominated Core-Collapse Supernovae
• Neutrino-driven Turbulent Convection and Standing Accretion Shock Instability in Three-Dimensional Core-Collapse Supernovae
• Turbulence in Core-Collapse Supernovae
• Core collapse with magnetic fields and rotation
• New insights on the spin-up of a neutron star during core-collapse
• The Boltzmann-radiation-hydrodynamics Simulations of Core-collapse Supernovae with Different Equations of State: the Role of Nuclear Composition and the Behavior of Neutrinos
• Critical Surface for Explosions of Rotational Core-Collapse Supernovae
• Angular momentum redistribution by SASI spiral modes and consequences for neutron star spins
• Stochasticity and efficiency of simplified core-collapse supernova explosions
• Linear analysis on the growth of non-spherical perturbations in supersonic accretion flows
• Reviving the stalled shock by jittering jets in core collapse supernovae: jets from the standing accretion shock instability
• Links between the shock instability in core-collapse supernovae and asymmetric accretions of envelopes
• Effects of rotation and magnetic field on the revival of a stalled shock in supernova explosions
• Amplifying magnetic fields of a newly born neutron star by stochastic angular momentum accretion in core collapse supernovae
• A Parametric Study of the SASI Comparing General Relativistic and Nonrelativistic Treatments