Modeling Mergers of Known Galactic Systems of Binary Neutron Stars

Abstract

We present a study of the merger of six different known galactic systems of binary neutron stars (BNS) of unequal mass with a mass ratio between $0.75$ and $0.99$. Specifically, these systems are J1756-2251, J0737-3039A, J1906+0746, B1534+12, J0453+1559 and B1913+16. We follow the dynamics of the merger from the late stage of the inspiral process up to $\sim$ 20 ms after the system has merged, either to form a hyper-massive neutron star (NS) or a rotating black hole (BH), using a semi-realistic equation of state (EOS), namely the seven-segment piece-wise polytropic SLy with a thermal component. For the most extreme of these systems ($q=0.75$, J0453+1559), we also investigate the effects of different EOSs: APR4, H4, and MS1. Our numerical simulations are performed using only publicly available open source code such as, the Einstein Toolkit code deployed for the dynamical evolution and the LORENE code for the generation of the initial models. We show results on the gravitational wave signals, spectrogram and frequencies of the BNS after the merger and the BH properties in the two cases in which the system collapse within the simulated time.

arXiv comment13 pages, 10 figures

References in corpus (65)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
• The equation of state for nucleon matter and neutron star structure
• Characterization of the LIGO detectors during their sixth science run
• A unified equation of state of dense matter and neutron star structure
• On the Numerical Integration of Einstein's Field Equations
• Tests of general relativity from timing the double pulsar
• Interferometer design of the KAGRA gravitational wave detector
• Properties of the Binary Black Hole Merger GW150914
• An increased estimate of the merger rate of double neutron stars from observations of a highly relativistic system
• Constraints on a phenomenologically parameterized neutron-star equation of state
• Isolated and dynamical horizons and their applications
• Astrophysical Implications of the Binary Black-Hole Merger GW150914
• Evolutions in 3D numerical relativity using fixed mesh refinement
• Binary and Millisecond Pulsars
• The Einstein Toolkit: A Community Computational Infrastructure for Relativistic Astrophysics
• Gauge conditions for long-term numerical black hole evolutions without excision
• Timing Measurements of the Relativistic Binary Pulsar PSR B1913+16
• Phase Transitions in Warm, Asymmetric Nuclear Matter
• Measuring neutron-star properties via gravitational waves from binary mergers
• On the Maximum Mass of Differentially Rotating Neutron Stars
• A Fast Apparent-Horizon Finder for 3-Dimensional Cartesian Grids in Numerical Relativity
• Remnant massive neutron stars of binary neutron star mergers: Evolution process and gravitational waveform
• Dynamical mass ejection from the merger of asymmetric binary neutron stars: Radiation-hydrodynamics study in general relativity
• Introduction to Isolated Horizons in Numerical Relativity
• Quasiequilibrium sequences of synchronized and irrotational binary neutron stars in general relativity. I. Method and tests
• Binary Neutron Star Mergers
• Generic Isolated Horizons and their Applications
• Spectral properties of the post-merger gravitational-wave signal from binary neutron stars
• Pulsar J0453+1559: A Double Neutron Star System with a Large Mass Asymmetry
• Testing Approximations of Thermal Effects in Neutron Star Merger Simulations
• Geometry of Generic Isolated Horizons
• Gravitational waves and nonaxisymmetric oscillation modes in mergers of compact object binaries
• Observational constraints on hyperons in neutron stars
• Properties of hypermassive neutron stars formed in mergers of spinning binaries
• Exploring properties of high-density matter through remnants of neutron-star mergers
• Towards a Stable Numerical Evolution of Strongly Gravitating Systems in General Relativity: The Conformal Treatments
• Accurate simulations of the dynamical bar-mode instability in full General Relativity
• Observing Gravitational Waves From The Post-Merger Phase Of Binary Neutron Star Coalescence
• Unequal mass binary neutron star mergers and multimessenger signals
• Revealing the high-density equation of state through binary neutron star mergers
• The Lazarus project: A pragmatic approach to binary black hole evolutions
• A Comprehensive Study of Relativistic Gravity using PSR B1534+12
• PSR J1756-2251: a new relativistic double neutron star system
• IllinoisGRMHD: An Open-Source, User-Friendly GRMHD Code for Dynamical Spacetimes
• Gravitational-wave phasing for low-eccentricity inspiralling compact binaries to 3PN order
• The young, highly relativistic binary pulsar J1906+0746
• Numerical Relativity and Astrophysics
• The Binary Companion of Young, Relativistic Pulsar J1906+0746
• Binary Neutron Stars with Generic Spin, Eccentricity, Mass ratio, and Compactness - Quasi-equilibrium Sequences and First Evolutions
• The nature of low T/|W| dynamical instabilities in differentially rotating stars
• A multi-block infrastructure for three-dimensional time-dependent numerical relativity
• Structure of Stable Binary Neutron Star Merger Remnants: a Case Study
• Constraint damping of the conformal and covariant formulation of the Z4 system in simulations of binary neutron stars
• Intermediate-mass-ratio black hole binaries: intertwining numerical and perturbative techniques
• Constructing quasi-equilibrium initial data for binary neutron stars with arbitrary spins
• Exploring tidal effects of coalescing binary neutron stars in numerical relativity II: Longterm simulations
• Reducing orbital eccentricity in initial data of binary neutron stars
• Dynamical non-axisymmetric instabilities in rotating relativistic stars
• The $m=1$ instability \& gravitational wave signal in binary neutron star mergers
• Modeling Equal and Unequal Mass Binary Neutron Star Mergers Using Public Codes
• Binary neutron star merger simulations with different initial orbital frequency and equation of state
• Stiffness effects on the dynamics of the bar-mode instability of Neutron Stars in full General Relativity
• Neutron Star instabilities in full General Relativity using a $\Gamma =2.75$ ideal fluid

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• Gravitational waves from neutron star mergers and their relation to the nuclear equation of state
• Rotational properties of hypermassive neutron stars from binary mergers
• Merger of two neutron stars: predictions from the two-families scenario
• Structure of Stable Binary Neutron Star Merger Remnants: Role of Initial Spin
• Numerical-relativity simulations of long-lived remnants of binary neutron star mergers
• Spectral analysis of gravitational waves from binary neutron star merger remnants
• Convective Excitation of Inertial Modes in Binary Neutron Star Mergers
• Thermal behavior as indicator for hyperons in binary neutron star merger remnants
• Astrophysical Implications of Neutron Star Inspiral and Coalescence
• Addition of tabulated equation of state and neutrino leakage support to IllinoisGRMHD
• Long-Term Postmerger Simulations of Binary Neutron Star Coalescence: Formation of Toroidal Remnants and Gravitational Wave Afterglow
• Testing merging of Dark Exotic Stars from Gravitational Waves in the Multi-messenger approach