利用中子星-黑洞并合约束中子星的物态方程

中文摘要 AI 辅助

本研究探讨中子星-黑洞（NSBH）并合产生的引力波瞬变中可观测的潮汐效应。众所周知，中子星的潮汐形变携带有物态方程及中子星物质组成的印记。与双中子星并合不同，双中子星并合通过测量名为λ~的参数观测到两颗中子星的综合效应，而在中子星-黑洞并合中，可清晰测量中子星成分的潮汐形变参数。本研究探讨利用近期及未来规划的引力波探测器测量中子星裸潮汐形变的可行性，使用参数估计计算框架Bilby对当前及未来引力波探测器网络中的数百次NSBH并合进行贝叶斯推断，获取双星参数的后验概率分布函数。研究发现，在包括爱因斯坦望远镜（Einstein Telescope）和宇宙探测器（Cosmic Explorer）在内的未来探测器中，至少需要20个事件才能清晰区分中子星的物态方程。

英文摘要

In this work, we study tidal effects that can be observed in gravitational wave transient from neutron star-black hole (NSBH) mergers. It has been well known that neutron star's tidal deformation has imprint of equation of state and hence composition of neutron star matter. Compared to binary neutron star mergers, where we observe a combined effect of two neutron stars by measuring the parameter known as lambda tilde. In neutron star black hole mergers, we measure the tidal deformability of the neutron star component clearly. In this work, we study the feasibility of measuring the bare tidal deformability of a neutron star with planned gravitational detectors in the near and far future. We use the parameter estimation computation framework, Bilby is used to perform Bayesian inference for hundreds of NSBH mergers in current and future GW detector networks and obtain the posterior probability distribution functions of binary parameters. We find that we need at least 20 events to clearly distinguish the equation state of neutron stars in future detectors, including the Einstein Telescope and Cosmic Explorer.

发表机构

• Indian Institute of Technology Bombay（印度理工学院孟买分校）

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