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Hidden Broad-line Regions in Seyfert 2 Galaxies: From the Spectropolarimetric Perspective
Du P(杜璞); Wang JM(王建民); Zhang ZX(张志翔); Du, P; Wang, JM; Zhang, ZX
2017
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
EISSN2041-8213
Volume840Issue:1Pages:L6
SubtypeArticle
AbstractThe hidden broad-line regions (BLRs) in Seyfert 2 galaxies, which display broad emission lines (BELs) in their polarized spectra, are a key piece of evidence in support of the unified model for active galactic nuclei (AGNs). However, the detailed kinematics and geometry of hidden BLRs are still not fully understood. The virial factor obtained from reverberation mapping of type 1 AGNs may be a useful diagnostic of the nature of hidden BLRs in type 2 objects. In order to understand the hidden BLRs, we compile six type 2 objects from the literature with polarized BELs and dynamical measurements of black hole masses. All of them contain pseudobulges. We estimate their virial factors, and find the average value is 0.60 and the standard deviation is 0.69, which agree well with the value of type 1 AGNs with pseudobulges. This study demonstrates that (1) the geometry and kinematics of BLR are similar in type 1 and type 2 AGNs of the same bulge type (pseudobulges), and (2) the small values of virial factors in Seyfert 2 galaxies suggest that, similar to type 1 AGNs, BLRs tend to be very thick disks in type 2 objects.
Keywordgalaxies: active galaxies: nuclei galaxies: Seyfert quasars: emission lines
DOI10.3847/2041-8213/aa6d7b
WOS KeywordACTIVE GALACTIC NUCLEI ; SUPERMASSIVE BLACK-HOLES ; AGN MONITORING PROJECT ; ACCRETION DISK ; HOST GALAXIES ; MASS SCALE ; NGC-1068 ; LUMINOSITY ; EMISSION ; SIGMA
Indexed BySCI ; SCOPUS ; ADS
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000400176900002
ADS Bibcode2017ApJ...840L...6D
ADS URLhttps://ui.adsabs.harvard.edu/abs/2017ApJ...840L...6D
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2017ApJ...840L...6D/citations
AXRIV CODE174
inspireid1591803
Citation statistics
Cited Times:1 [INSPIRE]
Cited Times:10 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/284709
Collection粒子天体物理中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Du P,Wang JM,Zhang ZX,et al. Hidden Broad-line Regions in Seyfert 2 Galaxies: From the Spectropolarimetric Perspective[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,840(1):L6.
APA 杜璞,王建民,张志翔,Du, P,Wang, JM,&Zhang, ZX.(2017).Hidden Broad-line Regions in Seyfert 2 Galaxies: From the Spectropolarimetric Perspective.ASTROPHYSICAL JOURNAL LETTERS,840(1),L6.
MLA 杜璞,et al."Hidden Broad-line Regions in Seyfert 2 Galaxies: From the Spectropolarimetric Perspective".ASTROPHYSICAL JOURNAL LETTERS 840.1(2017):L6.
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