Core Collapse Supernova Gravitational Wave Sourcing and Characterization based on Three-Dimensional Models

Abstract

We present for the first time an analysis of high-frequency gravitational wave (GW) emission from proto-neutron stars (PNS) in core collapse supernovae (CCSN) that combines spatial decomposition and modal decomposition to both source and characterize the emission using three-dimensional CCSN simulations. We analyze simulations initiated from 15 and 25 solar mass progenitors with Solar- and zero-metallicity respectively. We decompose the GW strains into five spatial regions and find that strains are initially largest in the PNS surface layers from accretion and later largest from the Ledoux convective and convective overshoot regions of the PNS. We compute the fractional GW luminosity as a function of enclosed radius and observe that most of the luminosity moves from the PNS surface to deep within the PNS at later times. Using a self-consistent perturbative analysis, we investigate the evolution of the oscillation modes of the PNS. We find that the frequency of the evolving high-frequency component of the GW signal is well matched to the eigenfrequency evolution of the ${}^2{g}_2$-, ${}^2{g}_1$-, and ${}^{2}f$-modes over time. We show that the ${}^{2}g$-modes emit most of their power in GW initially from the PNS surface region, but within a few 100 ms after bounce, it is the convective overshoot region of the PNS that emits the most GW power for the ${}^2{g}_1$-mode. Eventually, the ${}^{2}f$-mode is the dominant mode producing GWs, and they are emitted primarily from the convective overshoot region. Thus, we show that, while the GW emission is global, it is possible to source the dominant contributions to it. We find that the source of the high-frequency GW emission from the PNS in CCSN is more complex than assessed by other methods, as well as time dependent, first emitted by ${}^{2}g$-modes driven by accretion onto the PNS and later emitted by the ${}^{2}f$-mode driven by sustained Ledoux convection.

23 pages, 11 figures

References in corpus (43)

• GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
• Theory of Core-Collapse Supernovae
• Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
• Nucleosynthesis and Evolution of Massive Metal-Free Stars
• Physics of Core-Collapse Supernovae in Three Dimensions: a Sneak Preview
• Perspectives on Core-Collapse Supernova Theory
• Explosion Mechanism, Neutrino Burst, and Gravitational Wave in Core-Collapse Supernovae
• A New Multi-Dimensional General Relativistic Neutrino Hydrodynamics Code of Core-Collapse Supernovae III. Gravitational Wave Signals from Supernova Explosion Models
• The Status of Multi-Dimensional Core-Collapse Supernova Models
• Characterizing the Gravitational Wave Signal from Core-Collapse Supernovae
• Hydrodynamics of core-collapse supernovae and their progenitors
• The gravitational wave signal from core-collapse supernovae
• Gravitational Wave Signals from 3D Neutrino Hydrodynamics Simulations of Core-Collapse Supernovae
• Gravitational Wave Emission from 3D Explosion Models of Core-Collapse Supernovae with Low and Normal Explosion Energies
• Three-dimensional core-collapse supernova simulations of massive and rotating progenitors
• Temporal and Angular Variations of 3D Core-Collapse Supernova Emissions and their Physical Correlations
• Gravitational-wave signal of a core-collapse supernova explosion of a 15 Solar mass star
• Gravitational wave signatures in black-hole-forming core collapse
• Towards asteroseismology of core-collapse supernovae with gravitational-wave observations - II. Spacetime perturbations
• Universal relations for gravitational-wave asteroseismology of proto-neutron stars
• Towards asteroseismology of core-collapse supernovae with gravitational-wave observations - I. Cowling approximation
• Equation of State Dependent Dynamics and Multimessenger Signals from Stellar-mass Black Hole Formation
• Gravitational wave asteroseismology with protoneutron stars
• Equation of State Dependence of Gravitational Waves in Core-Collapse Supernovae
• Core Collapse Supernova Gravitational Wave Emission for Progenitors of 9.6, 15, and 25 Solar Masses
• Probing mass-radius relation of protoneutron stars from gravitational-wave asteroseismology
• Chimera: A massively parallel code for core-collapse supernova simulation
• Dependence of outer boundary condition on protoneutron star asteroseismology with gravitational-wave signatures
• Inference of proto-neutron star properties from gravitational-wave data in core-collapse supernovae
• Three-dimensional simulation of a core-collapse supernova for a binary star progenitor of SN 1987A
• Universal relation for supernova gravitational waves
• Three dimensional magnetorotational core-collapse supernova explosions of a 39 solar mass progenitor star
• Accuracy of relativistic Cowling approximation in protoneutron star asteroseismology
• Avoided crossing in gravitational wave spectra from protoneutron star
• Dimension dependence of numerical simulations on gravitational waves from protoneutron stars
• Inferring Astrophysical Parameters of Core-Collapse Supernovae from their Gravitational-Wave Emission
• Multimessenger Asteroseismology of Core-Collapse Supernovae
• Three approaches for the classification of protoneutron star oscillation modes
• Long-term gravitational wave asteroseismology of supernova: from core collapse to 20 seconds postbounce
• Measuring the properties of $f-$mode oscillations of a protoneutron star by third generation gravitational-wave detectors
• Universality in supernova gravitational waves with proto-neutron star properties
• Consistent perturbative modeling of pseudo-Newtonian core-collapse supernova simulations
• Unveiling the Nature of Gravitational-Wave Emission in Core-collapse Supernovae with Perturbative Analysis

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