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Changing-look active galactic nuclei: close binaries of supermassive black holes in action
Wang, Jian-Min1,2,3; Bon, Edi4
2020-11-03
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume643Pages:6
AbstractChanging-look active galactic nuclei (CL-AGNs) as a new subpopulation challenge some fundamental physics of AGNs because the timescales of the phenomenon can hardly be reconciled with accretion disk models. In this Letter, we demonstrate the extreme case: close binaries of supermassive black holes (CB-SMBHs) with high eccentricities are able to trigger the CL transition through one orbit. In this scenario, binary black holes build up their own mini-disks by peeling gas off the inner edges of the circumbinary disk during the apastron phase, after which they tidally interact with the disks during the periastron phase to efficiently exchange angular momentum within one orbital period. For mini-disks rotating retrograde to the orbit, the tidal torque rapidly squeezes the tidal parts of the mini-disks into a much smaller radius, which rapidly results in higher accretion and short flares before the disks decline into type-2 AGNs. Prograde-rotation mini-disks gain angular momentum from the binary and rotate outward, which causes a rapid turn-off from type-1 to type-2. Turn-on occurs around the apastron phase. CB-SMBHs control cycle transitions between type-1 and type-2 with orbital periods but allow diverse properties in CL-AGN light curves.
Keywordgalaxies: active black hole physics accretion accretion disks quasars: supermassive black holes
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC
DOI10.1051/0004-6361/202039368
WOS KeywordCIRCUMBINARY ACCRETION DISCS ; MISALIGNED ACCRETION ; SYSTEMATIC SEARCH ; VARIABILITY ; GAS ; RETROGRADE ; TRANSITION ; SIGNATURES ; DYNAMICS ; MODELS
Language英语
Funding ProjectNational Key R&D Program of China[2016YFA0400701] ; NSFC[NSFC-11991050] ; NSFC[NSFC-11991054] ; NSFC[NSFC-11833008] ; NSFC[NSFC-11690024] ; [QYZDJ-SSW-SLH007] ; [XDB23010400] ; [451-03-68/2020-14/200002] ; [CA16104]
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000588360900001
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/80835
Collection中国科学院国家天文台
Corresponding AuthorWang, Jian-Min
Affiliation1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ China, 20A Datun Rd, Beijing 100020, Peoples R China
4.Astron Observ Belgrade, Volgina 7, Belgrade 11060, Serbia
Recommended Citation
GB/T 7714
Wang, Jian-Min,Bon, Edi. Changing-look active galactic nuclei: close binaries of supermassive black holes in action[J]. ASTRONOMY & ASTROPHYSICS,2020,643:6.
APA Wang, Jian-Min,&Bon, Edi.(2020).Changing-look active galactic nuclei: close binaries of supermassive black holes in action.ASTRONOMY & ASTROPHYSICS,643,6.
MLA Wang, Jian-Min,et al."Changing-look active galactic nuclei: close binaries of supermassive black holes in action".ASTRONOMY & ASTROPHYSICS 643(2020):6.
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