A BAYESIAN APPROACH TO ESTIMATE THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI USING REVERBERATION MAPPING DATA | |
Li, YR1; Wang, JM1,2; Ho, LC3,4; Du, P1; Bai JM(白金明)5,6 | |
刊名 | ASTROPHYSICAL JOURNAL |
2013-12-20 | |
卷号 | 779期号:2 |
关键词 | galaxies: active methods: data analysis methods: statistical quasars: general |
ISSN号 | 0004-637X |
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 |
内容类型 | 期刊论文 |
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). |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论