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A BAYESIAN APPROACH TO ESTIMATE THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI USING REVERBERATION MAPPING DATA

文献类型：期刊论文

作者Li, YR1; Wang, JM1,2; Ho, LC3,4; Du, P1; Bai JM(白金明)5,6
刊名ASTROPHYSICAL JOURNAL
出版日期2013-12-20
卷号779期号:2
ISSN号0004-637X
关键词galaxies: active methods: data analysis methods: statistical quasars: general
通讯作者Li, YR (reprint author), Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China.
产权排序第五完成单位
英文摘要This is the first paper in a series devoted to the systematic study of the size and structure of the broad-line region (BLR) in active galactic nuclei (AGNs) using reverberation mapping (RM) data. We employ a recently developed Bayesian approach that statistically describes the variability as a damped random walk process and delineates the BLR structure using a flexible disk geometry that can account for a variety of shapes, including disks, rings, shells, and spheres. We allow for the possibility that the line emission may respond non-linearly to the continuum, and we detrend the light curves when there is clear evidence for secular variation. We use a Markov Chain Monte Carlo implementation based on Bayesian statistics to recover the parameters and uncertainties for the BLR model. The corresponding transfer function is obtained self-consistently. We tentatively constrain the virial factor used to estimate black holemasses; more accurate determinations will have to await velocity-resolved RM data. Application of our method to RM data with H beta monitoring for about 40 objects shows that the assumed BLR geometry can reproduce quite well the observed emission-line fluxes from the continuum light curves. We find that the H beta BLR sizes obtained from our method are on average similar to 20% larger than those derived from the traditional cross-correlation method. Nevertheless, we still find a tight BLR size-luminosity relation with a slope of alpha = 0.55 +/- 0.03 and an intrinsic scatter of similar to 0.18 dex. In particular, we demonstrate that our approach yields appropriate BLR sizes for some objects (such as Mrk 142 and PG 2130+099) where traditional methods previously encountered difficulties.
学科主题Astronomy & Astrophysics
WOS标题词Science & Technology ; Physcial Sciences
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]BLACK-HOLE MASS ; AGN MONITORING PROJECT ; PEAKED EMISSION-LINES ; VELOCITY-DELAY MAPS ; SEYFERT 1 GALAXIES ; RADIUS-LUMINOSITY RELATIONSHIP ; TERM PROFILE VARIABILITY ; SELF-GRAVITATING DISKS ; DAMPED RANDOM-WALK ; COSMOLOGICAL EVOLUTION
收录类别SCI
原文出处http://iopscience.iop.org/article/10.1088/0004-637X/779/2/110/meta
语种英语
WOS记录号WOS:000328187200020
源URL[http://ir.ynao.ac.cn/handle/114a53/5424]  
专题云南天文台_丽江天文观测站（南方基地）
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, China
2.National Astronomical Observatories of China, Chinese Academy of Sciences, 20A Datun Road, Beijing 100020, China
3.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
4.The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA
5.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
6.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式
GB/T 7714		 Li, YR,Wang, JM,Ho, LC,et al. A BAYESIAN APPROACH TO ESTIMATE THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI USING REVERBERATION MAPPING DATA[J]. ASTROPHYSICAL JOURNAL,2013,779(2).
APA Li, YR,Wang, JM,Ho, LC,Du, P,&Bai JM.(2013).A BAYESIAN APPROACH TO ESTIMATE THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI USING REVERBERATION MAPPING DATA.ASTROPHYSICAL JOURNAL,779(2).
MLA Li, YR,et al."A BAYESIAN APPROACH TO ESTIMATE THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI USING REVERBERATION MAPPING DATA".ASTROPHYSICAL JOURNAL 779.2(2013).

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来源：云南天文台

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