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(CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China;Department of Physics and Astronomy,University of California,Irvine,CA 92697,USA;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;CAS Center for Excellence in Particle Physics,Beijing 100049,China;Center for High Energy Physics,Peking University,Beijing 100871,China;School of Fundamental Physics and Mathematical Sciences,Hangzhou Institute for Advanced Study,UCAS,Hangzhou 310024,China;International Centre for Theoretical Physics Asia-Pacific,Beijing/Hangzhou,China;Department of Physics and Astronomy,University of Utah,Salt Lake City,UT 84112,USA)

机构地区：[1]CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China [2]Department of Physics and Astronomy,University of California,Irvine,CA 92697,USA [3]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [4]CAS Center for Excellence in Particle Physics,Beijing 100049,China [5]Center for High Energy Physics,Peking University,Beijing 100871,China [6]School of Fundamental Physics and Mathematical Sciences,Hangzhou Institute for Advanced Study,UCAS,Hangzhou 310024,China [7]International Centre for Theoretical Physics Asia-Pacific,Beijing/Hangzhou,China [8]Department of Physics and Astronomy,University of Utah,Salt Lake City,UT 84112,USA

出　　处：《Chinese Physics C》2022年第5期180-188,共9页中国物理C（英文版）

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)

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.

关 键 词：gravitational wave primordial black hole astro black hole MERGER stochastic gravitational wave background 

分 类 号：P142.84[天文地球—天体物理]