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Conformally Flat Smoothed Particle Hydrodynamics: Application to Neutron Star Mergers
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abstract
We present a new 3D SPH code which solves the general relativistic field + hydrodynamics equations in the conformally flat approximation. Several test cases are considered to test different aspects of the code. We finally apply then the code to the coalescence of a neutron star binary system. The neutron stars are modeled by a polytropic equation of state (EoS) with adiabatic indices $\Gamma=2.0$, $\Gamma=2.6$ and $\Gamma=3.0$. We calculate the gravitational wave signals, luminosities and frequency spectra by employing the quadrupole approximation for emission and back reaction in the slow motion limit. In addition, we consider the amount of ejected mass.
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Cited by 1 Pith paper
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Hyperonic degrees of freedom in binary neutron star mergers
A review of neutron star merger simulations showing that hyperonic equations of state yield distinctive gravitational wave, temperature, ejecta, and collapse-threshold signatures.
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