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Dynamics of compact objects in dense star clusters and implications for gravitational wave detections

致密星团中致密天体的动力学及其对引力波探测的影响

基本信息

批准号：
2578841
负责人：
金额：
--
依托单位：
CARDIFF UNIVERSITY
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2578841
关键词：
Dynamics compact objects dense star

项目摘要

The Ligo-Virgo interferometers have already detected 50 binary black hole mergers and hundreds to come. This new set of data will provide important clues to the properties of compact objects such as black holes and neutron stars and to the environments in which they form. The development of a theoretical understanding of the processes leading to compact object coalescence is required, which will enable to analyse and interpret the large number of new detections.Merging compact-object binaries can form as the result of: (i) the evolution of massive binary stars in the field of a galaxy; and (ii) dynamical interactions in the secular evolution of star clusters. We will make the first precise prediction for scenario (ii), which we will compare to gravitational wave data from Ligo and Virgo to establish whether binary black hole mergers come predominantly from clusters or the galactic field. The student will develop a numerical framework based on state-of-the-art software to make predictions for the gravitational waves produced by merging compact-objects in dense star clusters. By comparing the predictions of theoretical models to observations they will determine how the gravitational wave sources detected by LIGO-Virgo are formed.Astrophysics has entered a new Golden Age. Advanced LIGO and VIRGO are operational; new detectors such as KAGRA and LIGO India will soon come online, and LISA will fly in 2030s. This project will provide a theoretical framework for the physical interpretation of this wealth of unprecedented new data.

Ligo-Virgo干涉仪已经探测到50个双黑洞合并，还有数百个。这组新数据将为黑洞和中子星等致密天体的性质及其形成环境提供重要线索。需要从理论上了解导致致密天体合并的过程，从而能够分析和解释大量新探测到的致密天体双星合并的原因可能是：㈠大质量双星在星系场中的演化; ㈡星星团长期演化过程中的动力学相互作用。我们将对场景（ii）进行第一次精确预测，我们将与Ligo和Virgo的引力波数据进行比较，以确定二元黑洞合并是否主要来自星系团或银河场。学生将开发一个基于最先进软件的数值框架，以预测密集星星集群中合并致密物体产生的引力波。通过比较理论模型的预测和观测结果，他们将确定LIGO-Virgo探测到的引力波源是如何形成的。天体物理学已经进入了一个新的黄金时代。先进的LIGO和VIRGO正在运行;新的探测器，如KAGRA和LIGO印度将很快上线，丽莎将在2030年代飞行。该项目将为这一前所未有的新数据财富的物理解释提供理论框架。