The next observing runs of advanced gravitational-wave detectors will lead to a variety of binary neutron star detections and numerous possibilities for multimessenger observations of binary neutron star systems. In this context a clear understanding of the merger process and the possibility of prompt black hole formation after merger is important, as the amount of ejected material strongly depends on the merger dynamics. These dynamics are primarily affected by the total mass of the binary, however, the mass ratio also influences the postmerger evolution. To determine the effect of the mass ratio, we investigate the parameter space around the prompt-collapse threshold with a new set of fully relativistic simulations. The simulations cover three equations of state and seven mass ratios in the range of $1.0\le q\le 1.75$, with five to seven simulations of binary systems of different total mass in each case. The threshold mass is determined through an empirical relation based on the collapse time, which allows us to investigate effects of the mass ratio on the threshold mass and also on the properties of the remnant system. Furthermore, we model effects of mass ratio and equation of state on tidal parameters of threshold configurations.

中文翻译：

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用数值相对论模拟研究快速塌陷阈值的质量比依赖性

高级引力波探测器的下一次观测运行将导致对双中子星的各种探测和对双中子星系统的多信使观测的多种可能性。在这种情况下，清楚地了解合并过程以及合并后迅速形成黑洞的可能性很重要，因为喷射物质的数量很大程度上取决于合并动力学。这些动态主要受二元总质量的影响，但是，质量比也影响合并后的演变。为了确定质量比的影响，我们使用一组新的完全相对论模拟研究了快速塌陷阈值周围的参数空间。模拟涵盖了三个状态方程和七个质量比，范围为$1.0\le q\le 1.75$，在每种情况下对总质量不同的二元系统进行五到七次模拟。阈值质量是通过基于塌陷时间的经验关系确定的，这使我们能够研究质量比对阈值质量以及残余系统特性的影响。此外，我们模拟了质量比和状态方程对阈值配置潮汐参数的影响。