Tracing the massive inflows feeding super-massive black holes in quasars  

作　　者：Peng Jiang Xiheng Shi Hongyan Zhou 

机构地区：[1]Key Laboratory for Polar Science,MNR,Polar Research Institute of China,Shanghai 200136,China [2]School of Astronomy and Space Sciences,University of Science and Technology of China,Hefei 230026,China

出　　处：《The Innovation》2023年第1期40-41,共2页创新（英文）

基　　金：supported by the Natural Science Foundation of Shanghai(grant nos.20ZR1463400,20ZR1473600,and 22ZR1481200).

摘　　要：ACCRETION OF SMBHs IN QUASARS Strong observational evidence accumulated since the end of the last century indicates that the vastmajority of galaxies host at their centers a black hole with a mass range of M_(SMBH)
10^(6)-10^(10) M_(⊙)(solar mass).Going back in time,these super-massive black holes(SMBHs)should grow from seed black holes possibly with M_(seed)
10^(2)-10^(5) M_(⊙),“activated”mainly by accretion of the interstellar medium in their host galaxies.During their fast growing phase,such SMBHsmanifest themselves as quasars,producing asmuch as 104 times the luminosity of a typical galaxy,such as the Milky Way.Most of the observed energy is emitted by a hot accretion disk around the SMBH,with a radius of several light days,where the gravitational energy of the inspiralling gas is converted into thermal energy.Considering the energy budget,an enormous amount of the fueling gas,at up to several tens M_(⊙)=year,is expected to be transported into the accretion disk and be consumed,at last,from the galactic environment at a scale of 105 light years or more from the center.

关 键 词：MASSIVE galaxies galaxy 

分 类 号：P145.8[天文地球—天体物理]