Stochastic ravitational wave background from PBH-ABH mergers

作     者：Wenfeng Cui Fei Huang Jing Shu Yue Zhao 崔文峰;黄飞;舒菁;赵悦

作者机构：CAS Key Laboratory of Theoretical PhysicsInstitute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Department of Physics and AstronomyUniversity of CaliforniaIrvineCA 92697USA School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China CAS Center for Excellence in Particle PhysicsBeijing 100049China Center for High Energy PhysicsPeking UniversityBeijing 100871China School of Fundamental Physics and Mathematical SciencesHangzhou Institute for Advanced StudyUCASHangzhou 310024China International Centre for Theoretical Physics Asia-PacificBeijing/HangzhouChina Department of Physics and AstronomyUniversity of UtahSalt Lake CityUT 84112USA 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2022年第46卷第5期

页      面：180-188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] 

基　　金：Supported by the National Key Research and Development Program of China (2020YFC2201501) supported by the National Natural Science Foundation of China (12025507, 12150015, 12047503) the Strategic Priority Research Program and Key Research Program of Frontier Science of the Chinese Academy of Sciences (XDB21010200, XDB23010000, ZDBS-LY-7003) CAS project for Young Scientists in Basic Research YSBR-006 supported by the International Postdoctoral Exchange Fellowship Program by the National Science Foundation of China (12022514,11875003) supported by U.S. Department of Energy(DESC0009959) 

主　　题：gravitational wave primordial black hole astro black hole merger stochastic gravitational wave background 

摘      要：The measurement of gravitational waves produced by binary black-hole mergers at the Advanced LIGO has encouraged extensive studies on the stochastic gravitational wave background. Recent studies have focused on gravitational wave sources made of the same species, such as mergers from binary primordial black holes or those from binary astrophysical black holes. In this paper, we study a new possibility - the stochastic gravitational wave background produced by mergers of one primordial black hole and one astrophysical black hole. Such systems are necessarily present if primordial black holes exist. We study the isotropic gravitational wave background produced through the history of the universe. We find it is very challenging to detect such a signal. We also demonstrate that it is improper to treat the gravitational waves produced by such binaries in the Milky Way as a directional stochastic background due to a very low binary formation rate.