Supermassive black holes triggered by QCD axion bubbles  

作　　者：Hai-Jun Li Ying-Quan Peng Wei Chao Yu-Feng Zhou 

机构地区：[1]Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China [2]Center for Advanced Quantum Studies,Department of Physics,Beijing Normal University,Beijing 100875,China [3]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [4]School of Fundamental Physics and Mathematical Sciences,Hangzhou Institute for Advanced Study,UCAS,Hangzhou 310024,China [5]International Centre for Theoretical Physics Asia-Pacific,Beijing/Hangzhou,China

出　　处：《Communications in Theoretical Physics》2024年第5期134-139,共6页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China (NSFC) (Grant Nos. 11775025 and No. 12175027);supported by the National Key R&D Program of China (Grant No. 2017YFA0402204);the CAS Project for Young Scientists in Basic Research YSBR-006;the National Natural Science Foundation of China (NSFC) (Grant Nos. 11821505, No. 11825506, and No. 12047503)

摘　　要：Supermassive black holes(SMBHs)are ubiquitous in the center of galaxies,although the origin of their massive seeds is still unknown.In this paper,we investigate the formation of SMBHs from the quantum chromodynamics(QCD)axion bubbles.In this case,primordial black holes(PBHs)are considered as the seeds of SMBHs,which are generated from the QCD axion bubbles due to an explicit Peccei–Quinn(PQ)symmetry breaking after inflation.The QCD axion bubbles are formed when the QCD axion starts to oscillate during the QCD phase transition.We consider a general case in which the axion bubbles are formed with the bubble effective angle θ_(eff)∈(0,π],leading to the minimum PBH mass∼■(10^(4)−10^(7))M⊙for the axion decay constant f_(a)∼■(10^(16))GeV.The PBHs at this mass region may account for the seeds of SMBHs.

关 键 词：supermassive black holes primordial black holes quantum chromodynamics axion 

分 类 号：P145.8[天文地球—天体物理]