Effects of Rotation on Stochasticity of Gravitational Waves in Nonlinear Phase of Core-Collapse Supernovae

Abstract

By performing three-dimensional (3D) simulations that demonstrate the neutrino-driven core-collapse supernovae aided by the standing accretion shock instability (SASI), we study how the spiral modes of the SASI can have impacts on the properties of the gravitational-wave (GW) emission. To see the effects of rotation in the non-linear postbounce phase, we give a uniform rotation on the flow advecting from the outer boundary of the iron core, whose specific angular momentum is assumed to agree with recent stellar evolution models. We compute fifteen 3D models in which the initial angular momentum as well as the input neutrino luminosities from the protoneutron star are changed in a systematic manner. By performing a ray-tracing analysis, we accurately estimate the GW amplitudes generated by anisotropic neutrino emission. Our results show that the gravitational waveforms from neutrinos in models that include rotation exhibit a common feature otherwise they vary much more stochastically in the absence of rotation. The breaking of the stochasticity stems from the excess of the neutrino emission parallel to the spin axis. This is because the compression of matter is more enhanced in the vicinity of the equatorial plane due to the growth of the spiral SASI modes, leading to the formation of spiral flows circulating around the spin axis with higher temperatures. We point out that a recently proposed future space interferometers like Fabry-Perot type DECIGO would permit detection of these signals for a Galactic supernova.

13 Figures, ApJ in press

References in corpus (15)

• Delayed neutrino-driven supernova explosions aided by the standing accretion-shock instability
• Instability of a stalled accretion shock: evidence for the advective-acoustic cycle
• The gravitational wave burst signal from core collapse of rotating stars
• Pulsar spins from an instability in the accretion shock of supernovae
• Dimension as a Key to the Neutrino Mechanism of Core-Collapse Supernova Explosions
• Equation-of-State Dependent Features in Shock-Oscillation Modulated Neutrino and Gravitational-Wave Signals from Supernovae
• 3D Collapse of Rotating Stellar Iron Cores in General Relativity including Deleptonization and a Nuclear Equation of State
• Special Relativistic Simulations of Magnetically-dominated Jets in Collapsing Massive Stars
• Gravitational Waves from Core Collapse Supernovae
• Generic Gravitational Wave Signals from the Collapse of Rotating Stellar Cores
• A New Mechanism for Gravitational Wave Emission in Core-Collapse Supernovae
• Rotating Collapse of Stellar Iron Cores in General Relativity
• 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
• An axis-free overset grid in spherical polar coordinates for simulating 3D self-gravitating flows

Cited by in corpus (28)

• Three-dimensional Hydrodynamic Core-Collapse Supernova Simulations for an $11.2M_{\odot }$ Star with Spectral Neutrino Transport
• Multiple physical elements to determine the gravitational-wave signatures of core-collapse supernovae
• General-Relativistic Simulations of Three-Dimensional Core-Collapse Supernovae
• Gravitational Wave Signals from 3D Neutrino Hydrodynamics Simulations of Core-Collapse Supernovae
• Observing Gravitational Waves from Core-Collapse Supernovae in the Advanced Detector Era
• Parametrized 3D models of neutrino-driven supernova explosions: Neutrino emission asymmetries and gravitational-wave signals
• Fully General Relativistic Simulations of Core-Collapse Supernovae with An Approximate Neutrino Transport
• Gravitational waves from three-dimensional core-collapse supernova models: The impact of moderate progenitor rotation
• Gravitational Wave Signatures from Low-mode Spiral Instabilities in Rapidly Rotating Supernova Cores
• Inferring the core-collapse supernova explosion mechanism with gravitational waves
• Inferring Core-Collapse Supernova Physics with Gravitational Waves
• Three-Dimensional Simulations of SASI- and Convection-Dominated Core-Collapse Supernovae
• Multimessengers from core-collapse supernovae: multidimensionality as a key to bridge theory and observation
• Gravitational Waves from Neutrino Asymmetries in Core-Collapse Supernovae
• Characteristic Time Variability of Gravitational-Wave and Neutrino Signals from Three-dimensional Simulations of Non-Rotating and Rapidly Rotating Stellar Core-Collapse
• Impacts of Rotation on Three-dimensional Hydrodynamics of Core-collapse Supernovae
• The Transient Gravitational-Wave Sky
• Coherent Network Analysis of Gravitational Waves from Three-Dimensional Core-Collapse Supernova Models
• Dimension dependence of numerical simulations on gravitational waves from protoneutron stars
• Astrophysical science metrics for next-generation gravitational-wave detectors
• The observed neutron star mass distribution as a probe of the supernova explosion mechanism
• Revisiting Impacts of Nuclear Burning for Reviving Weak Shocks in Neutrino-Driven Supernovae
• Modeling Core-Collapse Supernovae Gravitational-Wave Memory in Laser Interferometric Data
• Gravitational Wave Signatures of Hyperaccreting Collapsar Disks
• Exploring Supernova Gravitational Waves with Machine Learning
• Gray Two-moment Neutrino Transport: Comprehensive Tests and Improvements for Supernova Simulations
• Core-Collapse Supernovae as Supercomputing Science: a status report toward 6D simulations with exact Boltzmann neutrino transport in full general relativity
• The rotational shear in pre-collapse cores of massive stars