标题： 无旋双中子星的准平衡状态 显示英文标题

标题： Irrotational binary neutron stars in quasiequilibrium

摘要： 我们报告了来自独立形式主义的数值结果，用于描述广义相对论中非同步双中子星的准平衡结构。 这是一个对有争议的数值流体动力学模拟的重要独立测试，这些模拟表明，接近最后稳定圆轨道的非同步中子星在之前可能会经历压缩。 我们表明，对于足够致密的恒星，当无旋双中子星接近它们的最后轨道时，内部密度会略有增加。 然而，这种效应的大小远小于先前流体动力学模拟中报告的大小。 显示英文摘要

摘要： We report on numerical results from an independent formalism to describe the quasi-equilibrium structure of nonsynchronous binary neutron stars in general relativity. This is an important independent test of controversial numerical hydrodynamic simulations which suggested that nonsynchronous neutron stars in a close binary can experience compression prior to the last stable circular orbit. We show that, for compact enough stars the interior density increases slightly as irrotational binary neutron stars approach their last orbits. The magnitude of the effect, however, is much smaller than that reported in previous hydrodynamic simulations.