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Gas flows in an active galactic nucleus - I. Two-phase gas inflow
Bu, De-Fu1; Yang, Xiao-Hong2; Zhu, Bocheng1
2020-08-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume496Issue:3Pages:3161-3168
AbstractWe perform two-dimensional hydrodynamic simulations to study the non-rotating gas flow in the region from 1 to 1000 pc. This region connects the galaxy scale and the accretion disc scale. The gas is irradiated by the photons generated by the accretion disc system near the central black hole with 10(8) solar mass. We assume that the luminosity of the central accretion system is constant and equals to 0.3 Eddington luminosity. Gas with density higher than 10(-24) g cm(-3) is found to be thermally unstable. Two phase, cold and hot, gas flow will form due to thermal instability. We calculated the ratio of cold gas accretion rate to hot gas accretion rate. This ratio is a function of gas density and generally increases with the increase of gas density. The maximum value of this ratio is 16, when gas density is 10(-21) g cm(-3). Gas with density lower than 10(-24) g cm(-3) is found to be thermally stable and the gas flow is one-phase. The applications of the results are briefly discussed.
Keywordaccretion, accretion discs black hole physics galaxies: active galaxies: nuclei
Funding OrganizationNatural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC
DOI10.1093/mnras/staa1752
WOS KeywordNARROW-LINE REGION ; BLACK-HOLES ; ACCRETION FLOWS ; KINEMATICS ; SIMULATIONS ; FEEDBACK ; GALAXIES ; DYNAMICS ; OUTFLOW ; MODELS
Language英语
Funding ProjectNatural Science Foundation of China[11773053] ; Natural Science Foundation of China[11573051] ; Natural Science Foundation of China[11633006] ; Natural Science Foundation of China[11661161012] ; Natural Science Foundation of China[11973018] ; Key Research Program of Frontier Sciences of CAS[QYZDJSSW-SYS008] ; Natural Science Foundation Project of CQ CSTC[cstc2019jcyj-msxmX0581]
Funding OrganizationNatural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000574919300029
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81781
Collection中国科学院国家天文台
Corresponding AuthorBu, De-Fu; Yang, Xiao-Hong
Affiliation1.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
Recommended Citation
GB/T 7714
Bu, De-Fu,Yang, Xiao-Hong,Zhu, Bocheng. Gas flows in an active galactic nucleus - I. Two-phase gas inflow[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,496(3):3161-3168.
APA Bu, De-Fu,Yang, Xiao-Hong,&Zhu, Bocheng.(2020).Gas flows in an active galactic nucleus - I. Two-phase gas inflow.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,496(3),3161-3168.
MLA Bu, De-Fu,et al."Gas flows in an active galactic nucleus - I. Two-phase gas inflow".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 496.3(2020):3161-3168.
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