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Illuminating neutron star and dark matter models with Gravitational Wave Events

报告题目:Illuminating neutron star and dark matter models with Gravitational Wave Events

报告人:张弘 副教授,上海大学

报告时间:2021430号上午10:30-11:30

报告地点:苏州大学天赐庄校区致远楼301

报告邀请人:朱睿东

报告摘要:We use a holographic model of quantum chromodynamics to extract the equation of state (EoS) for the cold nuclear matter of moderate baryon density. We solve the Tolman-Oppenheimer-Volkoff equations for the compact stars and obtain the reasonable compactness. Based on these configurations we further calculate the tidal deformability of the single and binary stars. We find our results agree with the inferred values of LIGO/Virgo data analysis for GW events. Then we further propose three scenarios for compact hybrid stars consisting of nuclear and dark matters which could possibly serve as alternative interpretations to the LIGO/Virgo events GW170817 and GW190425. Besides, in GW190814, a new compact object with 2.6 solar mass is reported. This could be the lightest black hole, the heaviest neutron star, and a dark or hybrid star. We extend the discussion to hybrid stars made of various self-interacting dark matter (SIDM) in the isotropic limit.

报告人简介:张弘,上海大学理学院物理系副教授。2008年毕业于清华大学工程物理系,获学士学位;2013年毕业于东京大学物理系,获博士学位;2013-2018年在中央大学,西江大学,中国科学院理论物理研究所,台湾师范大学从事博士后研究,2021年入职上海大学;研究方向为超弦理论:4D 规范场/2D 共形场对应,可积性;数学物理:量子代数,代数工学,超对称性;引力波与广义相对论:双星合并,引力波观测,暗物质星探测等。发表十余篇文章,总引用数321h index11

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