论文标题
二进制中子星级合并模拟中状态方法的混合方程
Hybrid equation of state approach in binary neutron-star merger simulations
论文作者
论文摘要
我们研究了在完全相对论中二进制中子星模中的混合方程式在二进制中子星模中的使用，其中通过绝热指数$γ_ {\ rm {th}} $以近似方式包含热效应。我们采用了在Brueckner-Hartree-fock方法中得出的新开发的有限温度方程，并与相同国家方程的相应混合版本进行了比较，研究了$γ_{\ rm {th}} $不同选择如何影响Gravitation-Wave信号和水平属性。我们还与广泛使用的状态方程进行了比较，详细介绍了两种情况之间的差异。总体而言，我们确定在二进制中子星模仿真中使用状态的混合方程时，热护发指数的值$γ_ {\ rm {th}} \大约1.7 $最佳近似于使用完整的，有限的状态的物质的动力学和热力学行为。
We investigate the use of hybrid equations of state in binary neutron-star simulations in full general relativity, where thermal effects are included in an approximate way through the adiabatic index $Γ_{\rm{th}}$. We employ a newly developed finite-temperature equation of state derived in the Brueckner-Hartree-Fock approach and carry out comparisons with the corresponding hybrid versions of the same equation of state, investigating how different choices of $Γ_{\rm{th}}$ affect the gravitational-wave signal and the hydrodynamical properties of the remnant. We also perform comparisons with the widely used SFHo equation of state, detailing the differences between the two cases. Overall, we determine that when using a hybrid equation of state in binary neutron-star simulations, the value of thermal adiabatic index $Γ_{\rm{th}} \approx 1.7$ best approximates the dynamical and thermodynamical behaviour of matter computed using complete, finite-temperature equations of state.
