标题： 具有真实合并后轮廓的不同旋转的标量化中子星 显示英文标题

标题： Differentially rotating scalarized neutron stars with realistic post-merger profile

摘要： 双中子星合并的残余物最初具有强烈的差分旋转。 这些残余物的一些特性可以通过构建平衡中子星模型来准确建模。 在本文中，我们研究了广义相对论的一种修改，即带有质量标量场的标量-张量理论，将如何改变这一图景。 与之前的研究不同，我们实施了一种现实的经验性差分旋转定律，允许中子星模型在远离中心的位置达到最大角速度。 我们发现，在标量-张量理论中，存在质量和角动量远高于广义相对论的解。 它们在转变为准环状模型之前，能够保持准球形的能量密度分布，其角动量值显著高于纯广义相对论。 构建这样的中子星解是我们最终目标的第一步，即研究标量场化如何改变合并后残余物的稳定性和引力波辐射。 显示英文摘要

摘要： The merger remnant of a binary neutron star coalescence is initially strongly differentially rotating. Some properties of these remnants can be accurately modeled through building equilibrium neutron star models. In the present paper, we study how a modification of general relativity, namely scalar-tensor theory with a massive scalar field, will alter the picture. In contrast to previous studies, we implement a realistic phenomenological differential rotational law which allows for neutron star models to attain maximal angular velocity away from the center. We find that solutions with much higher masses and angular momenta exist in scalar-tensor theory compared to general relativity. They keep their quasi-spherical energy-density distribution for significantly higher values of the angular momentum before transitioning to quasi-toroidal models, in contrast to pure general relativity. Constructing such neutron star solutions is the first step to our final goal that is studying how scalarization alters the stability and gravitational wave emission of post-merger remnants.