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A High-quality Velocity-delay Map of the Broad-line Region in NGC 5548
Xiao M(肖铭); Du P(杜璞); Hu C(胡晨); Li YR(李彦荣); Zhang ZX(张志祥); Wang K(王凯); Huang YK(黄颖科); Wang JM(王建民); Xiao, M; Du, P; Lu, KK; Hu, C; Li, YR; Zhang, ZX; Wang, K; Huang, YK; Bai, JM; Bian, WH; Ho, LC; Yuan, YF; Wang, JM
2018
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
EISSN2041-8213
Volume865Issue:1Pages:L8
SubtypeArticle
AbstractNGC 5548 has been well spectroscopically monitored for reverberation mapping of the central kinematics by 19 campaigns. Using the maximum entropy method in this Letter, we build up a high-quality velocity-delay map of the H beta emission line in the light curves of the continuum and the line variations observed between 2015 and 2016. The map shows the response strength and lags of the velocity fields of the H beta-emitting regions. The velocity-delay structure of the map is generally symmetric, with strong red and blue wings at time lag tau less than or similar to 15 days, a narrower velocity distribution at tau greater than or similar to 15 days, and a deficit of response in the core. This is suggestive of a disk geometry of the broad-line region (BLR). The relatively weaker H beta response at the longer lags in the red side indicates anisotropic emission from the outer part of the BLR. We also recover the velocity-delay maps of NGC. 5548 from the historical data of 13 years to investigate the long-term variability of its BLR. In general, the BLR of NGC 5548 was switching between the inflow and virialized phases in the past years. The resultant maps of seven years reveal inflow signatures and show decreasing lags, indicating that the changes in the BLR size are related to the infalling BLR gas. The other four maps show potential disk signatures that are similar to our map.
Keywordgalaxies: active galaxies: individual (NGC 5548) galaxies: nuclei galaxies: Seyfert
DOI10.3847/2041-8213/aadf8f
WOS KeywordACTIVE GALACTIC NUCLEI ; AGN MONITORING PROJECT ; REVERBERATION MAPPING DATA ; BLACK-HOLE ; EMISSION-LINES ; DISK WINDS ; ARP 151 ; MASS ; INVERSION ; DYNAMICS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000445132200004
ADS Bibcode2018ApJ...865L...8X
AXRIV CODE1809
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:9 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/286358
Collection粒子天体物理中心
实验物理中心
加速器中心
Corresponding AuthorDu P(杜璞)
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Corresponding Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Xiao M,Du P,Hu C,et al. A High-quality Velocity-delay Map of the Broad-line Region in NGC 5548[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,865(1):L8.
APA 肖铭.,杜璞.,胡晨.,李彦荣.,张志祥.,...&Wang, JM.(2018).A High-quality Velocity-delay Map of the Broad-line Region in NGC 5548.ASTROPHYSICAL JOURNAL LETTERS,865(1),L8.
MLA 肖铭,et al."A High-quality Velocity-delay Map of the Broad-line Region in NGC 5548".ASTROPHYSICAL JOURNAL LETTERS 865.1(2018):L8.
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