Merger estimates for a disformal Kerr black hole in quadratic degenerate higher-order scalar-tensor theories
作者机构：Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of EducationSynergetic Innovation Center for Quantum Effects and Applicationsand Department of PhysicsHunan Normal UniversityChangsha 410081China Institute of Interdisciplinary StudiesHunan Normal UniversityChangsha 410081China Center for Gravitation and CosmologyCollege of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China
出 版 物：《Chinese Physics C》 (中国物理C（英文版）)
年 卷 期：2024年第48卷第5期
页 面：284-292页
核心收录：
学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 0702[理学-物理学]
基 金：Supported by the National Key Research and Development Program of China(2020YFC2201400) the National Natural Science Foundation of China(12275079,12035005,12275078)
主 题：black hole merger quasinormal modes final black hole spin disformal Kerr black hole quadratic degenerate higher-order scalar-tensor(DHOST)theory
摘 要：We investigate the main features of a disformal Kerr black hole merger in quadratic degenerate higher-order scalar-tensor *** the ringdown stage of the black hole merger,for the prograde orbit,the real part of the quasinormal modes decreases with an increase in the disformal parameter,and the imaginary part also decreases,except in the Kerr case for a large spin ***,for the retrograde orbit,the real part increases with an increase in the disformal parameter,and the imaginary part always decreases with *** the approximate final spin,regardless of an equal spin,unequal spin,or generic spin configuration merger,the final black hole spin always increases with an increase in the disformal *** results show that the disformal parameter in the disformal Kerr solution and the MOG parameter in the Kerr-MOG case have obviously different effects on the black hole merger,which suggests the differences between these two spacetime structures.
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