Merger estimates for a disformal Kerr black hole in quadratic degenerate higher-order scalar-tensor theories  

作　　者：蒋洪鑫 杜欣怡 潘启沅 陈松柏 荆继良 Hongxin Jiang;Xinyi Du;Qiyuan Pan;Songbai Chen;Jiliang Jing(Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education,Synergetic Innovation Center for Quantum Effects and Applications,and Department of Physics,Hunan Normal University,Changsha 410081,China;Institute of Interdisciplinary Studies,Hunan Normal University,Changsha 410081,China;Center for Gravitation and Cosmology,College of Physical Science and Technology,Yangzhou University,Yangzhou 225009,China)

机构地区：[1]Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education,Synergetic Innovation Center for Quantum Effects and Applications,and Department of Physics,Hunan Normal University,Changsha 410081,China [2]Institute of Interdisciplinary Studies,Hunan Normal University,Changsha 410081,China [3]Center for Gravitation and Cosmology,College of Physical Science and Technology,Yangzhou University,Yangzhou 225009,China

出　　处：《Chinese Physics C》2024年第5期284-292,共9页中国物理C（英文版）

基　　金：Supported by the National Key Research and Development Program of China(2020YFC2201400);the National Natural Science Foundation of China(12275079,12035005,12275078)。

摘　　要：We investigate the main features of a disformal Kerr black hole merger in quadratic degenerate higher-order scalar-tensor theories.In 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 parameter.However,for the retrograde orbit,the real part increases with an increase in the disformal parameter,and the imaginary part always decreases with it.For 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 parameter.Our 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.

关 键 词：black hole merger quasinormal modes final black hole spin disformal Kerr black hole quadratic degenerate higher-order scalar-tensor(DHOST)theory 

分 类 号：O17[理学—数学]