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Quenching Black Hole Accretion by Active Galactic Nuclei Feedback

文献类型：期刊论文

作者Bu, De-Fu1; Yang, Xiao-Hong2
刊名ASTROPHYSICAL JOURNAL
出版日期2019-02-01
卷号871期号:2页码:12
ISSN号0004-637X
关键词accretion, accretion disks black hole physics galaxies: active galaxies: nuclei
DOI10.3847/1538-4357/aaf807
英文摘要Observations of many dim galactic nuclei in the local universe give good estimations of gas density and temperature at the Bondi radius. If we assume the black hole accretes at the Bondi accretion rate and radiates at the efficiency of a low-luminosity hot accretion flow, the predicted nuclei luminosity can be significantly higher than that seen in observations. Therefore, the real black hole mass accretion rate in these sources may be significantly smaller than the Bondi value. Active galactic nucleus feedback may be responsible for decreasing the black hole accretion rate to values much smaller than the Bondi rate. We perform two-dimensional simulations of low angular -momentum accretion flow at parsec and subparsec scales around low-luminosity active galactic nuclei (LLAGNs). We take into account the radiation and wind feedbacks of the LLAGN. The cross section of particle particle interaction can be several orders of magnitude larger than that of photon-particle interaction. Therefore, we find that for the LLAGNs, the effects of radiation feedback in decreasing black hole accretion rates are small. However, wind feedback can effectively decrease the black hole mass accretion rate. Due to the decrease of the accretion rate, the black hole luminosity can be decreased by a factor of similar to 33-400. These results may be useful for explaining why many galactic nuclei in the local universe are so dim.
资助项目National Program on Key Research and Development Project of China[2016YFA0400704] ; Natural Science Foundation of China[11573051] ; Natural Science Foundation of China[11633006] ; Natural Science Foundation of China[11773053] ; Natural Science Foundation of China[11661161012] ; Natural Science Foundation of Shanghai[16ZR1442200] ; Key Research Program of Frontier Sciences of CAS[QYZDJSSW-SYS008]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000457048700006
源URL[http://119.78.226.72/handle/331011/31979]  
专题中国科学院上海天文台
通讯作者Bu, De-Fu
作者单位1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China
推荐引用方式
GB/T 7714		 Bu, De-Fu,Yang, Xiao-Hong. Quenching Black Hole Accretion by Active Galactic Nuclei Feedback[J]. ASTROPHYSICAL JOURNAL,2019,871(2):12.
APA Bu, De-Fu,&Yang, Xiao-Hong.(2019).Quenching Black Hole Accretion by Active Galactic Nuclei Feedback.ASTROPHYSICAL JOURNAL,871(2),12.
MLA Bu, De-Fu,et al."Quenching Black Hole Accretion by Active Galactic Nuclei Feedback".ASTROPHYSICAL JOURNAL 871.2(2019):12.

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来源：上海天文台

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