NAOC Open IR
A Magnetic Disk-outflow Model for Changing Look Active Galactic Nuclei
Feng, Junjie1,2; Cao, Xinwu3,4,5; Li, Jia-wen3; Gu, Wei-Min6
2021-08-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume916Issue:2Pages:12
AbstractThe timescales of the variabilities in changing look (CL) active galactic nuclei (AGNs) are usually on the order of years to tens of years (some of them are even shorter than one year), which is much shorter than the viscous timescale of a standard thin accretion disk. This implies that the variabilities of CL AGNs cannot be reproduced by varying the mass accretion rate of the thin disk. In this work, we employ a magnetic accretion disk-outflow model to calculate the inflow time of the disk predominantly driven by magnetic outflows. In this model, most angular momentum of the gas in the disk is carried away by the outflows, and therefore its radial velocity can be substantially higher than that of a conventional viscous disk. Our calculations show that the inflow time of such a disk with outflows can be around several years to tens of years. The calculated spectra of the disk with outflows can fit the observed spectra of a CL AGN Mrk 1018 quite well both in the low and high states. The derived inflow time of such a disk with outflows is around 5 yr in the high state, while it becomes similar to 20 yr in the low state, which is roughly consistent with the observations of the variabilities in Mrk 1018.
Funding OrganizationNSFC ; NSFC ; China Manned Space Project ; China Manned Space Project ; CAS ; CAS ; NSFC ; NSFC ; China Manned Space Project ; China Manned Space Project ; CAS ; CAS ; NSFC ; NSFC ; China Manned Space Project ; China Manned Space Project ; CAS ; CAS ; NSFC ; NSFC ; China Manned Space Project ; China Manned Space Project ; CAS ; CAS
DOI10.3847/1538-4357/ac07a6
WOS KeywordACCRETION-EJECTION PARADIGM ; X-RAY BINARIES ; PRANDTL NUMBER ; BLACK-HOLES ; LOOK AGN ; DRIVEN ; FIELD ; VARIABILITY ; WIND ; SPECTROPOLARIMETRY
Language英语
Funding ProjectNSFC[11773050] ; NSFC[11833007] ; NSFC[12073023] ; NSFC[12033006] ; China Manned Space Project[CMS-CSST-2021-A06] ; CAS[QYZDJ-SSWSYS023]
Funding OrganizationNSFC ; NSFC ; China Manned Space Project ; China Manned Space Project ; CAS ; CAS ; NSFC ; NSFC ; China Manned Space Project ; China Manned Space Project ; CAS ; CAS ; NSFC ; NSFC ; China Manned Space Project ; China Manned Space Project ; CAS ; CAS ; NSFC ; NSFC ; China Manned Space Project ; China Manned Space Project ; CAS ; CAS
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000678351200001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/76548
Collection中国科学院国家天文台
Corresponding AuthorCao, Xinwu
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Zhejiang Univ, Dept Phys, Zhejiang Inst Modern Phys, 38 Zheda Rd, Hangzhou 310027, Peoples R China
4.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
5.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China
6.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China
Recommended Citation
GB/T 7714
Feng, Junjie,Cao, Xinwu,Li, Jia-wen,et al. A Magnetic Disk-outflow Model for Changing Look Active Galactic Nuclei[J]. ASTROPHYSICAL JOURNAL,2021,916(2):12.
APA Feng, Junjie,Cao, Xinwu,Li, Jia-wen,&Gu, Wei-Min.(2021).A Magnetic Disk-outflow Model for Changing Look Active Galactic Nuclei.ASTROPHYSICAL JOURNAL,916(2),12.
MLA Feng, Junjie,et al."A Magnetic Disk-outflow Model for Changing Look Active Galactic Nuclei".ASTROPHYSICAL JOURNAL 916.2(2021):12.
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