Gravitational waves from supernova matter

Abstract

We have performed a set of 11 three-dimensional magnetohydrodynamical core collapse supernova simulations in order to investigate the dependencies of the gravitational wave signal on the progenitor's initial conditions. We study the effects of the initial central angular velocity and different variants of neutrino transport. Our models are started up from a 15 solar mass progenitor and incorporate an effective general relativistic gravitational potential and a finite temperature nuclear equation of state. Furthermore, the electron flavour neutrino transport is tracked by efficient algorithms for the radiative transfer of massless fermions. We find that non- and slowly rotating models show gravitational wave emission due to prompt- and lepton driven convection that reveals details about the hydrodynamical state of the fluid inside the protoneutron stars. Furthermore we show that protoneutron stars can become dynamically unstable to rotational instabilities at T/|W| values as low as ~2 % at core bounce. We point out that the inclusion of deleptonization during the postbounce phase is very important for the quantitative GW prediction, as it enhances the absolute values of the gravitational wave trains up to a factor of ten with respect to a lepton-conserving treatment.

10 pages, 6 figures, accepted, to be published in a Classical and Quantum Gravity special issue for MICRA2009

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Cited by in corpus (22)

• A New Multi-Dimensional General Relativistic Neutrino Hydrodynamics Code of Core-Collapse Supernovae III. Gravitational Wave Signals from Supernova Explosion Models
• Hydrodynamics of core-collapse supernovae and their progenitors
• General-Relativistic Simulations of Three-Dimensional Core-Collapse Supernovae
• The gravitational wave signal from 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
• Equation of State Effects on Gravitational Waves from Rotating Core Collapse
• Gravitational waves from three-dimensional core-collapse supernova models: The impact of moderate progenitor rotation
• On the Impact of Three Dimensions in Simulations of Neutrino-Driven Core-Collapse Supernova Explosions
• Gravitational-wave signal of a core-collapse supernova explosion of a 15 Solar mass star
• Magnetorotational core collapse of possible GRB progenitors. III. Three-dimensional models
• A First Targeted Search for Gravitational-Wave Bursts from Core-Collapse Supernovae in Data of First-Generation Laser Interferometer Detectors
• Gravitational Wave Extraction in Simulations of Rotating Stellar Core Collapse
• Inferring the core-collapse supernova explosion mechanism with gravitational waves
• Supernova Seismology: Gravitational Wave Signatures of Rapidly Rotating Core Collapse
• Improving the background of gravitational-wave searches for core collapse supernovae: A machine learning approach
• Determining the Structure of Rotating Massive Stellar Cores with Gravitational Waves
• Multivariate Regression Analysis of Gravitational Waves from Rotating Core Collapse
• Exploring Supernova Gravitational Waves with Machine Learning
• Gravitational Lensing of Core Collapse Supernova Gravitational Wave Signals
• Gravitational waves from magnetorotational core-collapse supernovae using 3D GRMHD simulations: effect of rotation and magnetic fields
• Constraining the Time of Gravitational Wave Emission from Core-Collapse Supernovae