The role of mergers and gas accretion in black hole growth and galaxy evolution

被引：8
作者：
Zhang, Tian-Chi [1 ,2 ]
Guo, Qi [1 ,2 ]
Qu, Yan [1 ]
Gao, Liang [1 ,2 ,3 ]
机构：
[1] Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing 100101, Peoples R China
[2] Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
[3] Univ Durham, Dept Phys, Inst Computat Cosmol, South Rd, Durham DH1 3LE, England
来源：
RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2021年 / 21卷 / 08期
基金：
国家重点研发计划;
关键词：
methods; numerical; galaxies; evolution; (galaxies; ) quasars; supermassive black holes; ACTIVE GALACTIC NUCLEUS; DIGITAL SKY SURVEY; STAR-FORMATION; HOST GALAXIES; AGN ACTIVITY; COSMOLOGICAL COEVOLUTION; FUNDAMENTAL RELATION; LUMINOUS AGNS; HIGH-REDSHIFT; SIMULATIONS;
D O I：
10.1088/1674-4527/21/8/212
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We use a semi-analytic galaxy formation model to study the co-evolution of supermassive black holes (SMBHs) with their host galaxies. Although the coalescence of SMBHs is not important, the quasar-mode accretion induced by mergers plays a dominant role in the growth of SMBHs. Mergers play a more important role in the growth of SMBH host galaxies than in the SMBH growth. It is the combined contribution from quasar mode accretion and mergers to the SMBH growth and the combined contribution from starburst and mergers to their host galaxy growth that determine the observed scaling relation between the SMBH masses and their host galaxy masses. We also find that mergers are more important in the growth of SMBH host galaxies compared to normal galaxies which share the same stellar mass range as the SMBH host galaxies.
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页数：10
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